Malicious PDF — malware analysis report

Static analysis result for SHA-256 74f81e1df80cbe44…

MALICIOUS

PDF

79.9 KB Created: 2021-09-01 06:53:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b6da219ac5b84d4200c969dfdd3ae6da SHA-1: 96d2948e4dfe45b4d9d86a2b7971d20f10597090 SHA-256: 74f81e1df80cbe447a7399f3877d007c94a3194960880465b649e5e9d8142c4b
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is classified as malicious by ML models and ClamAV, exhibiting characteristics of a callback phishing or tech-support scam. It contains numerous links to potentially compromised websites, suggesting an attempt to host malicious content or redirect users. Although no scripts were extracted, the document's structure and heuristic firings strongly indicate a phishing or scam attempt designed to trick users into initiating contact.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 http://kondicionery-vidnoe.ru/upload_picture/file/44292305866.pdf In PDF document text
    • https://prcomponents.com/ckfinder/userfiles/files/46001540881.pdfIn PDF document text
    • http://staractivecollection.com/resimler/site/files/xidegataburokizopisapa.pdfIn PDF document text
    • http://tuvanthanhlapcongty.biz/upload/ck/files/45504568340.pdfIn PDF document text
    • http://cinebuzz.be/uploads/userfiles/files/74371911704.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/21e2e465852a0210b1ccaefe2a114c1b/22611587409.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abc373a13c2---wejijunumapasemajowavon.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/07068d3d1a555add0224112a11743316/jadozu.pdfIn PDF document text
    • https://fullgame.hu/uploads/files/75299798172.pdfIn PDF document text
    • https://www.temtechnologies.fr/ckfinder/userfiles/files/koduxe.pdfIn PDF document text
    • http://walkofagesvt.org/clients/0/0e/0e42319052772b195a43ba3ede0f03e0/File/lozexixuwesenesikumari.pdfIn PDF document text
    • http://alexhoffordphotography.com/temp/files/file/25596590917.pdfIn PDF document text
    • http://hawkins-kearney.com/clients/f/fa/fa1934e8f236f3272fb98c88546bd003/File/kitumunojibozufaged.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/25aaba3657e457c98bfa2564767ad1a3/12752675894.pdfIn PDF document text
    • http://www.tamtrebinhminh.com/public/files/74829496139.pdfIn PDF document text
    • http://accronline.com/userfiles/file/tutogulufemajogiwofilijov.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/58ql3q3af5bdjqn159g35htpe2/kodinugaxuratupezumited.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/bonevojafono.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/8ad7c1e39a4698e53857ccad9125a23d/budinipojixazosalu.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608134838009f---68302492400.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160745e336ef64---79670391146.pdfIn PDF document text
    • http://varanini.pl/userfiles/file/94925410764.pdfIn PDF document text
    • http://bukharaalpharetta.com/sites/default/files/file/tipumelobavemugogave.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=mta+180+livingston+street+contact+numberPDF 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_off0000cea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEA8 11252 bytes
SHA-256: f5c60df67c83787f693376c74893df3910825b7cc5fe3b3dfb8d9cc073150632
font_01_sfnt_off0000e921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE921 17696 bytes
SHA-256: 203c3db060aa21d48cd533ad565461f08f14d6f140a42849378d8b5be287e756
font_02_sfnt_off00011780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11780 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1