Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2c14980a7a076ea…

MALICIOUS

PDF

92.6 KB Created: 2021-08-11 10:51:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 5569518221b196fbd350d703c2e99586 SHA-1: adb2edd0babb2aa5f45adf73d298822bfacc8f68 SHA-256: f2c14980a7a076eae8d554ac6da436b643818c183fc3412bb349931471c8c8ce
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link farm pointing to numerous URLs, some of which are hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading malware disguised as legitimate files. The presence of multiple external URIs and a link farm suggests an attempt to distribute malicious content or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://anandamsanyal.com/userfiles/file/jolafabuzemepawedenim.pdf In PDF document text
    • https://777mto.com/contents//files/66645042950.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160f128ffd1961---4650867276.pdfIn PDF document text
    • https://makeswebsites.com/clients/c/c8/c8c605999f3d8352d7bb792cf3fdb25b/File/zoguv.pdfIn PDF document text
    • https://mamadona.ru/ckfinder/userfiles/files/motapu.pdfIn PDF document text
    • https://aptitudeclass.com/ckfinder/userfiles/files/jajodoradezoririzojozexo.pdfIn PDF document text
    • https://www.restaurant-latableedevercel.com/ckfinder/userfiles/files/vatij.pdfIn PDF document text
    • http://sinproval.it/userfiles/files/34005796562.pdfIn PDF document text
    • https://trungtammatnamviet.vn/upload/files/39374335513.pdfIn PDF document text
    • https://mallncart.com/userfiles/files/lavelogapuma.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca38cb0381---3739415964.pdfIn PDF document text
    • http://au-coeur-du-temps.com/userfiles/file/wawof.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/a37459fcef273b55ac738be16172d9ab/darofusigabemekewegi.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161137ccdb048f---mupofenozenepupabotajor.pdfIn PDF document text
    • http://michellenevinracing.com/FCKeditor/file/rarifamafifevowi.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/9598418eb7875872974f5a7f596fe88f/jojofupanaz.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/f3dc0cb5eea4c059ec12f84ea0c681cf/38362919358.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/f6f541830a88e507e5d4e43eb42f2ae5/91667209655.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c897cbd9a6f---subekirolavedinawomox.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/20655224954.pdfIn PDF document text
    • http://asupuro.com/upload/save_image/files/votefima.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/6f34f75cf194ec94335fbb902fbe87dc/45800887791.pdfIn PDF document text
    • http://www.minaakshimajumdar.com/fckimages/file/99988369084.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=euro+truck+simulator+2+mod+apk+obb+download+for+androidPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE2 16880 bytes
SHA-256: abfc389d3120b0160bf1e26392920396a8c1c8a368d364e8c7e319915c645cb6
font_01_sfnt_off000102f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F8 11168 bytes
SHA-256: 5ef62fe9f90e0005d1b97e0d3a03926762472e74031182e3bbc55cbb7e7da728
font_02_sfnt_off00011cf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CF6 17824 bytes
SHA-256: cb6d26b5fc8fd08ee3e965c48307574d46d5d1796d008886462ed7539b10550b
font_03_sfnt_off00014bd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BD8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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