Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e141a13e6178a1e…

MALICIOUS

PDF

75.3 KB Created: 2020-12-28 15:41:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 91c65aa872f2e51c0f84346a3a025d07 SHA-1: bbf40b691af5d280ccfa556dd3e90845d669c40c SHA-256: 3e141a13e6178a1ed4aab1e6f33c77f67b23eca6c1907614e01e24e94a9045db
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, some of which are benign but others are unknown or malicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/strik?utm_term=kaiser+urgent+care+san+diego+zion In PDF document text
    • https://cdn.sqhk.co/wepaxuwelusu/jcwthbe/come_fare_gli_stickers_su_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/mifimafonuku/Bqgeid6/target_purple_tie_dye_sweatpants.pdfIn PDF document text
    • https://sitizoxibe.weebly.com/uploads/1/3/4/3/134317871/0428dd.pdfIn PDF document text
    • https://cdn.sqhk.co/kedezoge/gvhhXGw/superhero_mod_apk_game.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/accounting_internship_resume_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/gold_sparkle_background_free_vector.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/6016571731.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/17347914804.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0aa4c809-1247-465e-89b0-b9bcffa7df0f/87285120565.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/godaddy_renewal_coupon.pdfIn PDF document text
    • https://s3.amazonaws.com/wanalovum/vbuck_generator_real_no_scam.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/nutcracker_the_motion_picture_imdb.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE922 5092 bytes
SHA-256: fdd6cb705d091897da0840690d20ede59732f40cd2f1d8f52a7285fcf0372a28
font_01_sfnt_off0000fa8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8E 11292 bytes
SHA-256: 60e84debf88a5e53eb61223e65165dc9e8ba052fe809c084dba42b3a3c084d1a

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