Malicious PDF — malware analysis report

Static analysis result for SHA-256 117ebd24b55a4a78…

MALICIOUS

PDF

88.3 KB Created: 2021-06-30 09:51:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 4010608abe448c9f83b26b80a6bd87cf SHA-1: 25e9562535714620c5d43ee1c10570a0dfdd38f5 SHA-256: 117ebd24b55a4a78b1e6068c441ffb14584f053993ae48f5ac7d2be5ce47e03e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress sites, suggesting an attempt to distribute malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the overall structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc328ef280---luledo.pdf In PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/4a991cae86d632c5f39a23402235b413/86293971861.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160aba15fab456---rolisajupafelitoriv.pdfIn PDF document text
    • http://weymouthhighschoolclassof62.com/clients/5/50/50fe23896e84432c97ff20d680692bb9/File/jamalumodezeti.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/4tlc12vjl31u6s7eg0vdib9lq7/wifavoliridoli.pdfIn PDF document text
    • https://chung-pei.com/userfiles/file/kikusodaxabadorawu.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/dcf5b65f83a5d3e6b9a88b3236a0f310/22330148354.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/5c7bf2c8133070bf933f5df13718b166/wuzipewikoxidoku.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607592b892ab2---zorikukavek.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/26q5k559iars3uk9v1tdu5rlam/72827026934.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c759023c32c---21105504909.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2977d7e10---puzimapaseme.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/34016163e4a62844a21bd895c67bd3de/morij.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/2f54b4b77db5c7d47f75775a1a255510/nofexiku.pdfIn PDF document text
    • http://longchimvac.net/app/webroot/uploads/files/77560097942.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/epahuvqfbuce4erj7vogpuomlp/73417192595.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/g4s3ta49jft9kjpl9sg37br6r2/nolezepu.pdfIn PDF document text
    • http://xn--h49avwqct32ewe967crscpsaz7d.com/ckupload/files/webutawovubarukaloril.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/rotit.pdfIn PDF document text
    • http://pvhs1967.com/clients/a/aa/aa78cb05297cd93d8a9ab6bd1eb8a3c4/File/1656867119.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/r51a9vv3t6l8jv3fu3dfiaedjd/7252814304.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/pejijusitepeluwijidowa.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/daf4ae9edef87b1b767d231e9ba36060/76855565166.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/fcf62e864f9ab50e19c431ac71fb7de8/79429081342.pdfIn PDF document text
    • http://rld-carbon.ru/file/xetikawoba.pdfIn PDF document text
    • http://chayka-svg.ru/files/60349128749.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=can+you+see+if+someone+unfollowed+you+on+instagramPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AC 16752 bytes
SHA-256: 309f02747d222d6bab8741983d1a4b98c8f7fc183659a25852c14a20129eafb0
font_01_sfnt_off00011ff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FF4 11028 bytes
SHA-256: f7c7c88a000d3fc78c77ae59655154dde569c47a062ef6f8ac43aecaf65891b9
font_02_sfnt_off00013982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13982 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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