Malicious PDF — malware analysis report

Static analysis result for SHA-256 971a371a901911d9…

MALICIOUS

PDF

78.2 KB Created: 2021-10-01 09:46:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: bc64ecd5ddbc68a52f0b2b1ebf8a8023 SHA-1: da8759280c9562ad5069bc5cbd024190b97706c3 SHA-256: 971a371a901911d954c8a926097dd3f348bf3a57d015f9fc82b37fb2485323d3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of numerous unknown URLs indicates a broad distribution effort, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 http://noithatmyhome.com/img/files/94589509150.pdf In PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/09dc30e38d1a0dae734aaf61d2d528e5/mofamixizikifikaz.pdfIn PDF document text
    • http://www.huescalamagiaenfotos.com/userfiles/files/bikoregum.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614406c22c177---64780791238.pdfIn PDF document text
    • http://joy05.com/_UploadFile/Images/file/galovibo.pdfIn PDF document text
    • http://shiraz.sk/ckfinder/userfiles/files/zofokurefi.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613a7cbaa9ec8---tunowovebozoxim.pdfIn PDF document text
    • https://ku4ysk-9lgp4y.com/contents/files/giwokifugogategeteseku.pdfIn PDF document text
    • http://wxhsbl.com/ckfinder/userfiles/files/20211001_050820.pdfIn PDF document text
    • http://elcolono.net/userfiles/files/3157924355.pdfIn PDF document text
    • https://www.akilciilacdernegi.com/ckfinder/userfiles/files/zunivutufukem.pdfIn PDF document text
    • http://afslab.asia/upload/files/24229089643.pdfIn PDF document text
    • http://snap-drone.com/userfiles/file/77109112647.pdfIn PDF document text
    • https://svarovanijelinek.cz/ckfinder/userfiles/files/8196138762.pdfIn PDF document text
    • https://eko-briketes.lv/userfiles/files/zuxurofutadugufod.pdfIn PDF document text
    • https://umutfm.com/resimler/files/lexozidinixozetogupa.pdfIn PDF document text
    • http://www.ciesol.com/ckfinder/userfiles/files/89290746897.pdfIn PDF document text
    • https://medbillings.us/lightspeedweb1/file/vefokan.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/ea42ae5f68f637b9a0d1df48d261f745/15135637085.pdfIn PDF document text
    • https://eksiliotomotiv.com/upload/ckfinder/files/xupajejus.pdfIn PDF document text
    • http://ammk.sk/userfiles/file/35097824412.pdfIn PDF document text
    • http://educaholistica.com/resources/img/imagesck/files/69852957180.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=the+grand+mafia+game+download+apkPDF link annotation
    • http://zs.tom.ru/jsplugins/ckfinder/userfiles/files/30070766458.pdfIn PDF document text
    • 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_off0000c469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC469 10820 bytes
SHA-256: 48e2c8b92fc2efa074736edf3126fe8e87407a2b9c8ae38d2f49b2a81d8069f4
font_01_sfnt_off0000dcf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF3 20784 bytes
SHA-256: e0385d7541ee7b48a3523aa8f5594c787c471600e26629a6542c1499b43a416c
font_02_sfnt_off000112db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1