Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd19227040d28d34…

MALICIOUS

PDF

95.3 KB Created: 2021-08-09 01:26:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d916cb602d559fd8cb388ae80aa9a0d6 SHA-1: 7d24447f03883b2108cdcbafaa516a351be8c795 SHA-256: bd19227040d28d342672c5a63f505c87df3da3b6bc1e5b95a10c0d1d2324af31
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document contains a link farm pointing to various PDF files hosted on compromised WordPress sites, suggesting an attempt to distribute malicious content or redirect users. The 'SE_CALLBACK_LURE' heuristic indicates the document likely prompts the user to call a phone number, consistent with tech-support scams or callback phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9889

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/dc5f84b440c167375026e7380a0b4e29/61823464225.pdf In PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/6ece7397e6f23368000dd80c6f8ce608/mowixofasef.pdfIn PDF document text
    • https://kermanrooz.com/img/files/43071795505.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942cf683039---963805822.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/dejawakefulokojo.pdfIn PDF document text
    • http://songhakbbq.com/uploads/files/9323729581.pdfIn PDF document text
    • https://iiml-pgpsm.in/ckfinder/uploads/userfiles/files/81611183910.pdfIn PDF document text
    • https://ottopianos.nl/files/xolesasugurekifixazeganuf.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bab2059b3e1---losubugilemurewokezis.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160757f9af3900---28696024755.pdfIn PDF document text
    • http://mya1fc.com/files/ckuploads/files/23891710659.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160807dfc2d6b2---bitimeb.pdfIn PDF document text
    • https://pharmawell.eu/ckfinder/userfiles/files/49854533532.pdfIn PDF document text
    • https://liantoong.com/archive/upload/files/fujakun.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/65ef9fc94e326b6d57a4f7fab221a01e/sipinusaponoguj.pdfIn PDF document text
    • http://nebo52.ru/uploads/files/gudaluvumijolaluxatifad.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160fdae26a361e---89431725136.pdfIn PDF document text
    • http://martonelektro.hu/files/file/24756368487.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///damajadabeduxekisem.pdfIn PDF document text
    • http://acutecardio.ru/sadm_files/tiwaperurinubufiboxek.pdfIn PDF document text
    • https://thuaphatlaihoanghuy.com/uploads/files/15307796637.pdfIn PDF document text
    • http://ncabhsa.com/clients/875427/File/xupedaw.pdfIn PDF document text
    • http://186086.com/upload/files/gopuwisirimimixa.pdfIn PDF document text
    • https://www.babetravelling.com/ckfinder/userfiles2/files/98985733504.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d897b2cb605---zumodizugaz.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16094cc8fca4d7---zurajaxofu.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd29089ce9---nixodogu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=material+safety+data+sheet+for+lithium+ion+batteryPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E7F 10964 bytes
SHA-256: e03fb136cde7a6c4fe420eb9c15536630377ff0f8df03d3505b83bd38a08e4ba
font_01_sfnt_off000127bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127BD 17920 bytes
SHA-256: d1e2e1d3e66475a99efdfc6d3b40d01faa61316208249c3e121338bcfecac617
font_02_sfnt_off00015716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15716 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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