Malicious PDF — malware analysis report

Static analysis result for SHA-256 70f212e6b910f48a…

MALICIOUS

PDF

78.2 KB Created: 2021-03-27 21:09:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: aeb7c5ca3e6c893cc9967c0631aad9c1 SHA-1: 04bc5625d176b64d2a828ed64977a70fcc376a52 SHA-256: 70f212e6b910f48a76576a5f3a68a439e81eb2bcb40548e5d0a735451f0f17b4
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to disposable domains or known malicious redirectors, indicating a link farm designed to distribute malware or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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.
  • 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://dafemum.ru/123?utm_term=tok+presentation+example+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4451752/normal_5fe5bb69599b9.pdfIn PDF document text
    • https://pigegiwoxare.weebly.com/uploads/1/3/5/3/135385020/tabaxosubukor.pdfIn PDF document text
    • https://fukidupedogof.weebly.com/uploads/1/3/2/8/132814182/0744bf88e0a44.pdfIn PDF document text
    • http://jamutanizeduzu.iblogger.org/o_reilly_core_python_programming.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxonewebuke/Atiiihw/mcdonald_s_breakfast_hours_start.pdfIn PDF document text
    • https://xexidizufom.weebly.com/uploads/1/3/4/5/134508107/6a4108e84a0.pdfIn PDF document text
    • https://cdn.sqhk.co/nugopanage/dPBoanD/43315584223.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393637/normal_60142d177235d.pdfIn PDF document text
    • https://cdn.sqhk.co/datawafag/jUXqje7/panda_pop_1002.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377663/normal_5fcb275e7975e.pdfIn PDF document text
    • https://cdn.sqhk.co/jewimebobi/cBhejC5/photo_editor_app_for_pc_windows_8._1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413712/normal_5fe3932ab4bb0.pdfIn PDF document text
    • https://vobogokofudukig.weebly.com/uploads/1/3/0/7/130775751/xokuxetakanulukop.pdfIn PDF document text
    • https://bawuzuxagoju.weebly.com/uploads/1/3/4/3/134340420/bisatigoneparixizatu.pdfIn PDF document text
    • https://cdn.sqhk.co/zivugeri/RO44ovn/ghost_guns_arkansas.pdfIn PDF document text
    • https://cdn.sqhk.co/xenojepezere/bwhdeKR/51355280450.pdfIn PDF document text
    • http://jadelurapesa.22web.org/53926917774.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385635/normal_5fefa958cea47.pdfIn PDF document text
    • https://puxonuge.weebly.com/uploads/1/3/1/3/131383548/zanidazefujoxo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e82f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE82F 5056 bytes
SHA-256: 556a7734e6016643fa8bbc41fb17a80f9c4d05c4ee2babcb15392655733aa9f2
font_01_sfnt_off0000f942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF942 10560 bytes
SHA-256: fb287f850578eb4d35d89bf11f3fe71e437756d144d0d8def312d57339b424b6
font_02_sfnt_off00011d4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D4C 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230