Malicious PDF — malware analysis report

Static analysis result for SHA-256 249ef467c055f41c…

MALICIOUS

PDF

88.5 KB Created: 2021-06-28 04:26:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 929efedee8e48f0d6935bb7ed1d0503d SHA-1: adad4a710dc9f49a9dc07d63993278dbadb50139 SHA-256: 249ef467c055f41c729a0bf79c72899c3595730f318726f87854fa9f14775c45
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. The presence of numerous external URIs, many pointing to compromised WordPress upload directories and disposable hosting, suggests a link farm designed to redirect users to malicious content. The primary attack pattern involves luring users via a document that likely contains deceptive content, leading them to download further malicious payloads from these external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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 https://allytemp.ru/uplcv?utm_term=my+dog+loves+to+cuddle PDF link annotation
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/b8b7f326dd24a023cbd7bd3d31aeaee2/buxefikowitokopikozewo.pdfIn PDF document text
    • https://vietnaminsight.biz/ckfinder/userfiles/files/27032092956.pdfIn PDF document text
    • http://jogforbigt.com/clients/6/61/61f7a61d17da296148a50ccd59c4a139/File/22533567362.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/45877647285.pdfIn PDF document text
    • http://waelfawzy.com/userfiles/file/gozanadexewagegududa.pdfIn PDF document text
    • http://dalaichau.com/files/22518517554.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/4e8884a304958ee33775b88f41886e2b/93009723862.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/dc79c54d19e19a91856e09aa99750dca/mabavizeguxaxanopupu.pdfIn PDF document text
    • https://computerzone.pk/file/gevirosujixuzufogaduvaten.pdfIn PDF document text
    • http://chanakyaaerospacedefence.com/userfiles/file/vokaligixupurex.pdfIn PDF document text
    • https://lotte-ppta.com/beta/assets/file/86779808231.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/b4df5110f0769ac31024a055a1bb579a/26185663502.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/c3f4806037f11bb1a424660534670017/75560588221.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095da51c20f2---96830224418.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c346f484218---lojixosidisite.pdfIn PDF document text
    • http://lbhs1965.com/clients/6/6b/6bdd8f708684a1f547efbf97e1630fe5/File/95154639259.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/74903755987.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6c4147407---zubefuz.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/fi0je13aj49dcgmcrmfc5ub9mv/siwotubanewus.pdfIn PDF document text
    • https://ebooksweb.net/files/file/dizofuwetukajipukufitazi.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16083075c4d3ec---56481451240.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e516fb9b2a---4572533838.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/pub8t9pim78mntfeirs4baor10/56113303154.pdfIn PDF document text
    • 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_off0000f7a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A7 17200 bytes
SHA-256: 2c99814f21e4eda00fa6d45b9c87a4acaee83b5e1b2ea9516ccdea1eeb7f2a14
font_01_sfnt_off0001240f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1240F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013c26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C26 10360 bytes
SHA-256: 8148ff9e8cf867fb5f3c2e602a5eedad387dcc4088a2e319e15058ec9554889f

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