Malicious PDF — malware analysis report

Static analysis result for SHA-256 63d6250e3f88a716…

MALICIOUS

PDF

72.3 KB Created: 2020-12-25 22:34:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 52012fd34bd15b1a979c33d63de318c9 SHA-1: 38492efe5fd12b9b9f4e1ca0d8b7f177983a08b8 SHA-256: 63d6250e3f88a7165d9286d5ccfa08a4b006848a6c43e53b6d7eb0cfcc335fa3
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://trafftec.ru/strik?utm_term=major+mayhem+apk+hack+download PDF link annotation
    • https://cdn.sqhk.co/dodirorip/Tg8Cd2B/company_of_heroes_android.pdfIn PDF document text
    • https://cdn.sqhk.co/likafupat/UiFajcX/10829765146.pdfIn PDF document text
    • https://cdn.sqhk.co/wememiguw/PcheZ8g/rifetipoperududewi.pdfIn PDF document text
    • https://dolakavurig.weebly.com/uploads/1/3/4/6/134647128/1da31daa85.pdfIn PDF document text
    • https://cdn.sqhk.co/gutemokerezo/dja3hjw/mini_world_craft_2_exploration_building_2020_online.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/vebogotexaf/advanced_english_vocabulary_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2787bfe5-4e59-4758-b749-3096f5e5908f/38411947602.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec375cae-05d9-4658-b629-e022842cfa92/roland_xp-10_multitimbral_synthesizer_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3074fe61-35ee-4b10-9db8-5d9ee4986134/eater_of_worlds_terraria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c043ee66-e43e-4dde-b789-742134c2f639/vipupuzuneniku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1a94f58-6137-4b5e-a717-e6c684f1176a/chrono_trigger_ipad_review.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/le_journal_el_khabar_d_aujourd_hui_en.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbe2e07f-223b-4c51-ae68-ce8a6492c2d5/83262142757.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_off0000dec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC2 5476 bytes
SHA-256: f069c2c8b83c413b306504e3ede770d3660fd9c14f73963db5b719ec3c118829
font_01_sfnt_off0000f15b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF15B 10264 bytes
SHA-256: 556c9ea135b47551c8be9dca566c62ca1a89e8dfa8cb27ef22e0b8da8475e199

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