Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fc2ca55165becb8…

MALICIOUS

PDF

80.5 KB Created: 2021-09-18 03:47:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: e7959d49f7fc1c80ca6623b589915908 SHA-1: 1487e55214813cd2299919d845dd6762c0d6802c SHA-256: 2fc2ca55165becb868a62d299cf04418b39a8fb4bcf4529e1d3f76385c8210e3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting, suggesting a phishing or redirection scheme. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to lead the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://tmkb.org.tr/ckfinder/userfiles/files/12077042064.pdf In PDF document text
    • https://sledovani2.gpshlidac.cz/www/userfiles/files/84203177999.pdfIn PDF document text
    • http://webursitet.org/Files/file/kabes.pdfIn PDF document text
    • https://kristaldicarlo.com/userfiles/file/garejuxep.pdfIn PDF document text
    • http://dfanchem.com/upload/files/98652677772.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/zajawadigovubegibakef.pdfIn PDF document text
    • http://fulepmark.hu/nyebu/fulepmark/userfiles/file/69434665891.pdfIn PDF document text
    • http://thaiboxes.com/piceditor/file/93374563696.pdfIn PDF document text
    • https://nitdgp.ac.in/uploads/userfiles/files/52449206667.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/93245310320.pdfIn PDF document text
    • http://shanghaiqingchen.com/upload/files/videmirovanajusebuvep.pdfIn PDF document text
    • http://hzxgdz.com/images/upload/File/18750237000.pdfIn PDF document text
    • https://ccskin.com/geektic/files/76676395495.pdfIn PDF document text
    • http://hftyby.com/upload_fck/file/2021-9-10/20210910021540538641.pdfIn PDF document text
    • http://smartpaintingplus.com/userfiles/files/nuligevutif.pdfIn PDF document text
    • https://texasbordervolunteers.org/userfiles/file/73789051932.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/48111621003.pdfIn PDF document text
    • https://tmtteks.com/files/33252554028.pdfIn PDF document text
    • http://urology-andrology.com/userfiles/file/xalinikubifuduwaze.pdfIn PDF document text
    • http://aptekarynek.pl/zdjecia/fck/file/63592963567.pdfIn PDF document text
    • http://realtor-madrid.com/uploades/fckeditorfile/kipanezuvilezarow.pdfIn PDF document text
    • https://kme.pl/global/app/webroot/uploads/file/16308030797421.pdfIn PDF document text
    • https://millinerandassoc.com/files/file/lexapizot.pdfIn PDF document text
    • http://mamaskitchenorder.com/uploads/files/18278179062.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=how+many+calories+is+a+mcflurryPDF 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_off0000d37c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD37C 10688 bytes
SHA-256: 32d70c44b44968588860cf9bfdd4acb9b9bfcfeeea57e4ac607680d8c6c5bda1
font_01_sfnt_off0000ec02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC02 18476 bytes
SHA-256: 377d4facb215379eadc89c5804b3dedd66a15cf309ddec821c06ee6e9d30ed6b
font_02_sfnt_off00011c95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C95 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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