Malicious PDF — malware analysis report

Static analysis result for SHA-256 34bedd94e35ec72e…

MALICIOUS

PDF

79.2 KB Created: 2021-06-04 15:49:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b5c297201e88167697f7b1294067ce6 SHA-1: e73c48400d39341d59c713e8da9ae0a6b7bfdcfb SHA-256: 34bedd94e35ec72e6e4ca3c1c187a87059b2fe29f5cfa49324b04eaa38eb692e
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, suggesting a link farm or phishing attempt. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate that the primary function is to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/123?utm_term=manualidades+de+flores+con+papel+china
    • https://cdn-cms.f-static.net/uploads/4481836/normal_60b96b386eda0.pdf
    • https://static.s123-cdn-static.com/uploads/4411935/normal_5fe12ac87a6d8.pdf
    • https://rodelifefi.weebly.com/uploads/1/3/0/7/130776661/ad46f6d941c104a.pdf
    • https://sokezimipadivob.weebly.com/uploads/1/3/5/9/135959039/715e66743b44f8c.pdf
    • https://tosabavol.weebly.com/uploads/1/3/0/8/130813831/5099846.pdf
    • https://cdn-cms.f-static.net/uploads/4374537/normal_600a03cb7ceb0.pdf
    • https://zikamesezelili.weebly.com/uploads/1/3/4/8/134857079/7454793.pdf
    • https://gepogixuzusesil.weebly.com/uploads/1/3/3/9/133999736/fopomosimubekaw.pdf
    • https://nuvetifozeg.weebly.com/uploads/1/3/4/3/134358797/xirezasuwumame-gojujipite-zejedi-jasivup.pdf
    • https://cdn-cms.f-static.net/uploads/4486365/normal_60185dd90244f.pdf
    • https://pajuzexakomujub.weebly.com/uploads/1/3/4/8/134898896/magaruletep_ranax_rixajeside.pdf
    • https://cdn-cms.f-static.net/uploads/4368229/normal_600d55b7ca3a1.pdf
    • https://foxewazijibaj.weebly.com/uploads/1/3/1/3/131379544/6c939af4.pdf
    • https://static.s123-cdn-static.com/uploads/4380393/normal_5fe5915221408.pdf
    • https://tejisapaw.weebly.com/uploads/1/3/1/1/131163851/letopobozid.pdf
    • https://zoxaxutonixada.weebly.com/uploads/1/3/5/9/135957052/7daa2b.pdf
    • https://sagolofuba.weebly.com/uploads/1/3/4/8/134873879/00000e.pdf
    • https://cdn-cms.f-static.net/uploads/4443292/normal_604fb326994ed.pdf
    • https://static.s123-cdn-static.com/uploads/4495558/normal_6004ccf0d8f88.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/c8c254a3-6e7b-4a7e-970a-f9de6bff48e1/crochet_afghan_patterns_for_super_bulky_yarn.pdf
    • https://uploads.strikinglycdn.com/files/6d1accf9-2e6c-4008-9a62-26eea063b9f6/34772455268.pdf
    • https://uploads.strikinglycdn.com/files/b9633ec6-74d6-4697-9195-e12feceff075/how_to_deal_with_adhd_and_odd_child.pdf
    • https://uploads.strikinglycdn.com/files/f1f9e4c9-a071-4416-a1a7-81705f72a466/27851601025.pdf
    • https://uploads.strikinglycdn.com/files/de0dcbc2-974b-41ea-8852-447b07959029/miss_peregrine_home_for_peculiar_full_movie.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfb7.bin
8e354ba77aaed99cb6a9bb884a45784d86b31ceaf320940f14c6a53902740d6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB7 5048 bytes
font_01_sfnt_off0000f0ce.bin
4d8699bd7527bc0d9365cb01bf7fc3d8fdab123ed33e39f1ad1ae9c91ffa025c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CE 1880 bytes
font_02_sfnt_off0000f9e6.bin
64701effee912ccfedbb22ad320f5559144e0f827b0bc251f4da5febfd5a2c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E6 11468 bytes
font_03_sfnt_off00011ed7.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11ED7 4324 bytes

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