Malicious PDF — malware analysis report

Static analysis result for SHA-256 d846001af5d893db…

MALICIOUS

PDF

87.2 KB Created: 2021-06-19 04:50:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 53df739e34a2f14ba1dc8b72ebeeec79 SHA-1: 31e4cd4f310376ddad4d0be17a27ad688ee8ba9e SHA-256: d846001af5d893db420eafd339e1e9674fe4047329c5afa919c3ca9c86596db3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://drafthe.ru/uplcv?utm_term=serena+safari+mp3+song+free+download+320kbps+pagalworld PDF link annotation
    • http://aquatrustfina.com/userfiles/file/86834647810.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/ec13708460688b9f40eb0bced354fdc4/99205913546.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1608babd7c830b---petaputavar.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16077834aeb982---91571794787.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/82010297794.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/josotosof.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/8kgodavc2q2v1evt89ch982ouk/89889712772.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/7f68f3301338ca75d1f79819b1824bc3/28659260630.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba5522f070---riloriset.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/pmqhqp4g3eoc1gobl7laarcl18/70195515919.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/c44b10ad8e96298924cd755811748230/sirogiwam.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/gulaf.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/49f2f0c98f79cb1e9daa625fe7588741/rumuxutufefonigiwasago.pdfIn PDF document text
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/wufopukipinibodaninukari.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/th91r97ptv8oumhktil80i4bp1/7883566402.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e2e0a27b10---44070164400.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB21 5908 bytes
SHA-256: c069a467a23ad83b10d1baa1bcee06b22e2cb47290cd1faccac86f26ebc3bfbc
font_01_sfnt_off0000df19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF19 5492 bytes
SHA-256: e4fd20450e022e597926039e04697ee4ed58c7c621fad2f74e6eb97ee20db28a
font_02_sfnt_off0000f087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF087 2904 bytes
SHA-256: 254443fe0de2870c7bdd1fbc85c5c68f6d6e616b02db2bc3de530d1f59b457e3
font_03_sfnt_off0000fc9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9E 13192 bytes
SHA-256: 366c501a8139d9479adddb70ae8f93006805ae2aed72ea014f85fe0ec52900e8
font_04_sfnt_off00012935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12935 16624 bytes
SHA-256: 43bd5c0a8b6adcb59577c407615705ba2a05ed21ade1c512ceb7600cf0cc6ca5
font_05_sfnt_off00014023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14023 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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