Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f642c356999cef…

MALICIOUS

PDF

88.9 KB Created: 2021-09-05 05:53:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a7f06e4b623202ddf2618f437a65a9b5 SHA-1: a8cd84f20cf2be5c16e620397c15f6bae3f893e7 SHA-256: 07f642c356999cefb6baf980b22230262783285bc09e967edc4970f282091e68
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm and a callback phishing lure, directing users to potentially compromised websites or encouraging them to call a phone number. Although no scripts were directly extracted, the PDF structure and URL patterns suggest it's designed to trick users into engaging with malicious content or actors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • 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.
  • 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://emmaushuis.org/pages/petetu.pdf In PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cedaba61c34---zetefinelusirinamuguf.pdfIn PDF document text
    • http://komputerzagrosze.pl/userfiles/file/kodiredusokuxo.pdfIn PDF document text
    • http://studiogalata.it/userfiles/files/loruwuwas.pdfIn PDF document text
    • http://elmbbq.com/uploads/files/labozikopofat.pdfIn PDF document text
    • https://celebicatering.com/upload/ckfinder/files/43877818669.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfd38980ad---66251970674.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a56c46efaec---66138933131.pdfIn PDF document text
    • http://dcbestwings.com/uploads/files/96885684104.pdfIn PDF document text
    • http://sumbulefendiegitimvakfi.com/resimler/files/88710630324.pdfIn PDF document text
    • http://mariondhuique-mayer.com/data/file/mivobowavoxowurebole.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/6b0f3a9d48d9329707fc74c80d337b43/68028261281.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16085f9ef4f0ea---jawaradokanasomi.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/salixa.pdfIn PDF document text
    • http://lenosada.sk/editor_uploads/files/90131100644.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/f6a6681f990238ffb3f27a64f5aa0256/xuzuru.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7943851901---7854910870.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/givozofikuwelixikujala.pdfIn PDF document text
    • http://mistral-paints.cz/userfiles/files/degenujozuxolidotirevujel.pdfIn PDF document text
    • http://meetburgerusa.com/uploads/files/44550342984.pdfIn PDF document text
    • https://shiokuda2.com/contents/files/detusixewev.pdfIn PDF document text
    • http://veivel.com/userfiles/file/29767091987.pdfIn PDF document text
    • http://dj-maily.com/uploads/pages/files/zosigafufo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=2015+jaguar+xj+owners+manual+pdfPDF 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_off0000f497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF497 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA9 17840 bytes
SHA-256: 1720026b37dbe5e0b2f29311459913777d7d38be7ef6227a4138234071e2b4bd
font_02_sfnt_off00013aa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AA0 11400 bytes
SHA-256: 04631bd8fa6906f98eeaeffbc8325bd63ecd32fbe464a1d55062b0e5c3b8a745

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