Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ea7be39aca3e0e2…

MALICIOUS

PDF

72.3 KB Created: 2021-03-11 23:06:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 967c55a62f287d92c1558fdca5f746d2 SHA-1: 113977369beeee480c000285611170d6326b577f SHA-256: 9ea7be39aca3e0e2e04504fe347061c9cd6a0cdac7072626a48d565167b17194
186 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 0.9998

Heuristics 6

  • 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 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.
  • 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 https://baarspo.ru/wix?keyword=rootjunky+apk+download PDF link annotation
    • https://cdn.sqhk.co/xixumobun/rbCjjXr/xajabuxojawarusekixelu.pdfIn PDF document text
    • https://fanepolareroroz.weebly.com/uploads/1/3/4/6/134666972/89c40.pdfIn PDF document text
    • https://cdn.sqhk.co/bexamajuw/ggxXOgi/download_game_gun_strike_2_apk.pdfIn PDF document text
    • https://gosabejeda.weebly.com/uploads/1/3/1/4/131453015/2067722.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380525/normal_602822f46e114.pdfIn PDF document text
    • https://cdn.sqhk.co/wepurodapike/dgigjR5/91127698479.pdfIn PDF document text
    • https://cdn.sqhk.co/pulununese/xjhYjfX/11383332922.pdfIn PDF document text
    • https://jeluxipofike.weebly.com/uploads/1/3/4/4/134490416/punaratulowuzixal.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444655/normal_5ffd660e7932b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420476/normal_6016caaaf15df.pdfIn PDF document text
    • http://devgame.design/retention_plan_templatel2vpo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424951/normal_6041457586f45.pdfIn PDF document text
    • https://lebamemodeli.weebly.com/uploads/1/3/0/7/130776101/1271765.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471238/normal_5ffd0bd44a0f5.pdfIn PDF document text
    • http://goodsfor.life/how_long_does_chicken_need_to_cook_on_a_george_foreman_grill8fofv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367279/normal_603e848e6e7d3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/de972ff8-616b-446c-bab0-4d54f96c0bb0/74483163793.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e283a7c8-e9c8-4bb7-bb8a-1f81b3023bac/71518387582.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15ed45d5-03ac-43fc-8b6a-87260b7538b2/34504566504.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6608e8d5-a415-4b74-9a6a-ff2331450de5/clinical_laboratory_science_review_a_bottom_line_approach_book_buy.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_off0000dfa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA3 5020 bytes
SHA-256: c8789e5089cd8c6f9b4ff8972d72e24feda1d5e777c15f58a73200e64d7dafa9
font_01_sfnt_off0000f0f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F4 10240 bytes
SHA-256: 793d577dea897a7f78038e0d4b4b2689964262814f476f8057b5b3c4a0ddcc20

Open this report in the interactive analyzer, or submit your own file for analysis.