Malicious PDF — malware analysis report

Static analysis result for SHA-256 9048381a13e7c105…

MALICIOUS

PDF

81.5 KB Created: 2021-08-16 08:51:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 981168e1bc78c09f7e22a90bbca16b50 SHA-1: 64807ff6ab18300f9919826f5e2baf650dfd8165 SHA-256: 9048381a13e7c1056d222f6dd23fbf8ced8d3007cf6902712effa5a18918eb0c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs and link farm heuristics, suggesting it is designed to redirect users to compromised websites. These links likely serve as a lure for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://coretry.ru/uplcv?utm_term=how+to+setup+a+netgear+universal+wifi+range+extender+wn3000rp PDF link annotation
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160aeb1378cf39---tuvakejiloraxu.pdfIn PDF document text
    • https://alkathirilaw.com/userfiles/files/58852770221.pdfIn PDF document text
    • http://dienvietbac.com/uploads/files/53030832037.pdfIn PDF document text
    • http://stinpo.com/ckfinder/userfiles/files/76720240057.pdfIn PDF document text
    • http://china-hold.com/UploadFile/file/20210802131137151.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/cdsl74j236qofm4u5037s4vflu/66746570917.pdfIn PDF document text
    • http://metalltechnik-kutschi.at/zajuvozo.pdfIn PDF document text
    • http://connectcontrol.net/files/userfiles/files/54669941536.pdfIn PDF document text
    • https://garyjetcenter.com/wp-content/plugins/super-forms/uploads/php/files/928d62830250fda35eb1ea2411a799d5/sobogarawuzejevusibop.pdfIn PDF document text
    • http://frickcontrols.com/uploads/files/32697790950.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/gtce4u3t8h2habscct1cjgq2d1/11875591493.pdfIn PDF document text
    • http://nitexprofi.cz/userfiles/file/84007011634.pdfIn PDF document text
    • https://www.nickelmarket.co.za/includes/ckfinder/userfiles/files/kunoxewobuwenagulawo.pdfIn PDF document text
    • http://ptichile.cl/userfiles/file/18092911766.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/1c5a4aae3f5cb4a04dea92bd089eb40b/lonenosidal.pdfIn PDF document text
    • http://aranysolyomfeszke.hu/editor_up/85276883553.pdfIn PDF document text
    • https://turismo-galicia.es/ckfinder/userfiles/files/27855467916.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/aobmllitijfdepd0r84sc3080i/nutaderujivufabo.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d227eddae0---25954907482.pdfIn PDF document text
    • http://onnetsolution.in/userfiles/file/29773183644.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16086c21c4666f---pasuxitololivabotabivag.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/12375290eaa70f79b438c00dd57fb169/74601856523.pdfIn PDF document text
    • http://pune-india.info/userfiles/file/4845442560.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/36814046630.pdfIn PDF document text
    • https://hse.tw/upload/file/liludize.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a83a892dd1e---bitanaxuzatepagil.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_off0000da1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA1F 17000 bytes
SHA-256: 23a0362e7ff97c8bdd63d9c38471b9a64c0d607a89be8805f3417ebc91445d61
font_01_sfnt_off0001056c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1056C 11312 bytes
SHA-256: 352274fe1044aecc40dfb38aa6238e6b107825f7ba9deac97ad565821a27b1e9
font_02_sfnt_off00011fff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FFF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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