Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3484d9a01857787…

MALICIOUS

PDF

76.6 KB Created: 2021-07-08 03:08:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 302474b37a7970e60aca6f71056e6c89 SHA-1: 8c85693cff2f311c643650135a56aebf0456cd56 SHA-256: e3484d9a01857787d74d3ae15743d805b0b628ca1c6cfcb0a93b61954ddfd091
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to various domains, some of which are hosted on compromised WordPress sites. The primary purpose appears to be redirecting users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • 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.
  • 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://wastran.ru/uplcv?utm_term=how+to+draw+anime+and+game+characters+vol+2+pdf
    • https://idd.no/ckfinder/userfiles/files/bezubewufupugojigemevenel.pdf
    • http://younewstoday.com/task/userimages/file/35584809356.pdf
    • https://egyptsuntours.com/userfiles/files/79678414907.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c6049bf0345---21360599954.pdf
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/papixufizibogukufewi.pdf
    • http://petersonspann.com/clients/3/32/32c4b2f41fa698b5b938e848169c8dcb/File/kimapelu.pdf
    • http://xn--80aamdqpfpr.xn--p1ai/upload_picture/lovuma.pdf
    • https://sfeerweter.nl/userfiles/files/69544889638.pdf
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/5bf9f6c5a0efeb52d2d01d9fe3478c00/82314925728.pdf
    • https://aartipalette.com/userfiles/file/1020653798.pdf
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16083a544601a1---11314366047.pdf
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d08139f39a8---lugelepejakuneneju.pdf
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe7ea973c7---87786845477.pdf
    • https://selapro.com.au/application/third_party/ckfinder/userfiles/files/3505600628.pdf
    • http://altinay-law.com/images/file/5350988066.pdf
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160e3d27618d0c---58794233124.pdf
    • http://antonio-pelella.eu/userfiles/files/rafiwipatutawojimexupo.pdf
    • http://cokhiminhhien.com/media/ftp/file/sawirelakokiw.pdf
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088f86a05a3e---mexumusaf.pdf
    • https://ludifrance.fr/userfiles/file/vemenowokudu.pdf
    • https://xo-sound.ru/userfiles/file/12657954592.pdf
    • http://rogo-rotterdam.nl/files/33942103155.pdf
    • https://mpressivelabels.com.au/application/third_party/ckfinder/userfiles/files/pexawelemusilasenugemezu.pdf
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/160855a0930795---luxebavebim.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c693.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC693 16792 bytes
font_01_sfnt_off0000dea5.bin
269446bc60ae2097cbcd907a99a83fa15abb68f0cd90d2eb4caafb3b415107c2
pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA5 16832 bytes
font_02_sfnt_off00010a8e.bin
894c9202050f9b51895434da8bd62fa56a6a367407e58b80bd4b3d72b573d72d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8E 11332 bytes