Malicious PDF — malware analysis report

Static analysis result for SHA-256 567c5d8c954404c9…

MALICIOUS

PDF

78.0 KB Created: 2021-03-06 16:12:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f73ed8e1f38c77d110a0c40f00e55fc5 SHA-1: 2e8af80d8a2c393e90ec754de7b986c5dae46729 SHA-256: 567c5d8c954404c9f183c44d584c5079b7e8b49c1621265d8863d8c5e203e681
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a significant number of external links, identified as a link farm, suggesting a malicious intent to redirect users to potentially harmful websites. The ClamAV detection and ML classifier strongly indicate malicious content, specifically a phishing or trojan variant. While no scripts were directly extracted, the PDF structure and numerous embedded URLs point towards a phishing or content-luring attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/aws?utm_term=2008+dodge+avenger+rt+transmission+problems
    • https://turabevov.weebly.com/uploads/1/3/0/9/130968962/ketofulifabow.pdf
    • https://cdn.sqhk.co/pozedezupase/WNhdjhZ/smart_launcher_5_pro_apk_android_1.pdf
    • https://cdn.sqhk.co/fugovigul/ykphjI2/80515483524.pdf
    • https://tavabaxo.weebly.com/uploads/1/3/1/0/131071290/2373281.pdf
    • https://cdn.sqhk.co/jivonaxadu/ggfZjdX/sugomelezogen.pdf
    • http://tewatag.medianewsonline.com/33219157766.pdf
    • http://makelemeg.mygamesonline.org/walmart_vtech_cs6709.pdf
    • https://cdn.sqhk.co/repudodo/f8nVM4d/splash_cars_mod_apk_unlimited_money.pdf
    • https://vobawele.weebly.com/uploads/1/3/5/3/135334277/9390549.pdf
    • https://cdn.sqhk.co/daluzowinasu/hjjjWhh/95348030914.pdf
    • https://cdn.sqhk.co/vatuliwa/gdm0BEY/voxugojesexosigonokumi.pdf
    • https://cdn.sqhk.co/nosamese/ifzQicz/51470879816.pdf
    • https://dopakegufa.weebly.com/uploads/1/3/1/3/131384718/wokekoj_metavixu.pdf
    • https://xitupiwe.weebly.com/uploads/1/3/4/4/134489196/mugotonegowape-xolumepes-farotumuwofek-laduwikivifaju.pdf
    • https://ridulimozujigo.weebly.com/uploads/1/3/4/1/134109280/148db3cda7135.pdf
    • http://tadurarawi.mypressonline.com/kedoxujav.pdf
    • https://diwamelebo.weebly.com/uploads/1/3/4/1/134108813/7bd95496.pdf
    • http://rawoxaxevog.mygamesonline.org/pogelenajenizosupuk.pdf
    • https://cdn.sqhk.co/bapuparit/hj3bRLB/ice_cream_cake_maker_game_download.pdf
    • https://tefegepivovopuf.weebly.com/uploads/1/3/5/3/135311357/2202998.pdf
    • https://cdn.sqhk.co/zoboxoba/thbFifA/extreme_car_driving_simulator_hack_version_apk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f151.bin
13df03660c1b9badb357e00d0800af4304e8e7d850ebc439337c544b0edf9268		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF151 5852 bytes
font_01_sfnt_off00010521.bin
73f1be949f8a439ab784422f00100323725eef3c1b92fdd47697c3adc21b7a81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10521 10804 bytes

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