Malicious PDF — malware analysis report

Static analysis result for SHA-256 217d934da0613d3e…

MALICIOUS

PDF

78.2 KB Created: 2021-03-18 00:07:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c95718f3a962349f94697185363c62f1 SHA-1: 272ef222cecdbbe00d7be49f299724a29328714c SHA-256: 217d934da0613d3ebcdca82c759da8adbe29cc36acb2a50fe291de230ffd769d
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, with the primary purpose of directing users to potentially malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to exploit users by redirecting them to compromised or malicious content.

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://resalured.ru/123?utm_term=dstv+compact+channels+guide PDF link annotation
    • https://cdn.sqhk.co/ridijafugemi/JShgpjj/givegojokujonililajagit.pdfIn PDF document text
    • https://cdn.sqhk.co/texirova/hfhiPgg/36541384893.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390638/normal_5fe7964f5c8ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501654/normal_60527d3487be9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373782/normal_602217029e137.pdfIn PDF document text
    • https://cdn.sqhk.co/zoluxoni/0A3iihh/crazy_racing_kartrider.pdfIn PDF document text
    • https://cdn.sqhk.co/wofunukasu/ejbtFIW/silver_cloud_inn_seattle_lake_union_hotel.pdfIn PDF document text
    • https://welerenumabo.weebly.com/uploads/1/3/4/4/134467224/721105.pdfIn PDF document text
    • https://cdn.sqhk.co/nitunoda/XskAWjf/basketball_world_cup_winners_2014.pdfIn PDF document text
    • https://cdn.sqhk.co/ronuwimo/gebugcT/73319837558.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415327/normal_600ce1e28ee47.pdfIn PDF document text
    • https://nerukime.weebly.com/uploads/1/3/1/3/131379394/9464358.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413118/normal_604fd9c359d2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494669/normal_601e3aeb122dc.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/4a44bcba-c0c6-4cc6-b36b-e856a6a334b4/the_audacity_of_hope_chapter_7_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4b50eef-4c4c-4fc8-8c4b-9e8abd53bbe5/champs_life_skills_program.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_off0000f437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF437 5452 bytes
SHA-256: d94c559c6e403f8ddde28f6edc02b6a1f890077c64b46d5f3294e6cc62808db7
font_01_sfnt_off000106ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106AC 10948 bytes
SHA-256: 99a5beec184ce07248d74442283a62d92ee9ea3c2431616aec10662f971fa929

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