Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb34302ae9142bf6…

MALICIOUS

PDF

82.6 KB Created: 2021-09-24 05:54:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 91b579232932fecd8dd98655407d9479 SHA-1: 92b3f16c2db39419da96326d230661cef181d71d SHA-256: fb34302ae9142bf614866a677d4c9ed536997e2b798fe6ab9474160ba4b9158b
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised CMS upload storage and disposable hosting, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and link farm heuristics point towards an attempt to redirect users to malicious content, likely leveraging embedded JavaScript for obfuscation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://jagominum.com/contents/files/60397636197.pdf In PDF document text
    • http://pxmonastery.org/CKEdit/upload/files/tuwedugalejemopojitemuru.pdfIn PDF document text
    • https://projetovm.com/uploads/files/56198386036.pdfIn PDF document text
    • http://girisimcilikproje.com/resimler/files/kifavebaderu.pdfIn PDF document text
    • http://evaemlak.com/userfiles/file///12642304637.pdfIn PDF document text
    • https://geniodelweb.com/file/wexivel.pdfIn PDF document text
    • http://svazekobciorlice.cz/userfiles/file/96380615893.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614464c49ab8e---52149335559.pdfIn PDF document text
    • http://pc580.cn/upload_fck/file/2021-9-5/20210905142359182407.pdfIn PDF document text
    • https://wineart.online/userfiles/file/jagaguwifuzoteputeka.pdfIn PDF document text
    • https://bonekarusa.com/contents/files/7470903286.pdfIn PDF document text
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/buxumifipapewikuna.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614746c19c95b---tebokitinipef.pdfIn PDF document text
    • http://anael.fr/fckeditor/userfiles/file/tegarilovalojet.pdfIn PDF document text
    • http://bkm-market.net/userfiles/file/fuxukofakevegu.pdfIn PDF document text
    • http://chnli.tw/CKEdit/upload/files/21333208342.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/f8fa9f1ee74277c1f0c79022b0dd069b/72816313179.pdfIn PDF document text
    • https://gullyracing.it/admin/ckfinder/userfiles/files/3803117853.pdfIn PDF document text
    • http://avanti.pl/userfiles/file/92816638807.pdfIn PDF document text
    • http://arnoldbolingbroke.com/ckfinder/userfiles/files/7508076779.pdfIn PDF document text
    • http://rent-lease-no1.com/userfiles/file/20210924055637.pdfIn PDF document text
    • http://dreamscar.eu/userfiles/file/ratik.pdfIn PDF document text
    • http://ad.ditroinfotech.com/laportal/ckeditor-ckfinder-integration/uploads/files/11948530645.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=can+i+use+my+phone+as+a+controller+for+ps3PDF 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_off0000d9f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f20b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20B 11164 bytes
SHA-256: 3f0d830f6204e149db11cbb609ef27552d7cb0301f6e5e43bb90cfb77625e16a
font_02_sfnt_off00010bfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BFD 18720 bytes
SHA-256: eb4b3176205d587bf55eeb615ef227a9258f7853afa94762dacbfc28f0d54c26