Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fc5c812e3a96948…

MALICIOUS

PDF

75.2 KB Created: 2021-03-15 12:41:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7b2ddf1a90fe2e14103e6b40e7bcaa15 SHA-1: e2dbeb51bcee3d29e8e39199e386144f0a2a4577 SHA-256: 5fc5c812e3a96948d16fbf766091f2866beebf7c7aafbae794af6961b2367373
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of embedded external links, a common tactic for SEO manipulation or directing users to phishing sites. While no scripts were explicitly extracted, the presence of numerous external links suggests an attempt to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/strik?utm_term=50+ways+to+leave+your+lover+drums+steve+gadd PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4482847/normal_600c05e3b9b51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447276/normal_60184bc502378.pdfIn PDF document text
    • https://cdn.sqhk.co/bidelefo/hdgiiha/vadeginixulekewebusisese.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450043/normal_5ff312c25834e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383795/normal_60049083b1263.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422373/normal_603e831be5be3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446643/normal_600aa3b73e35e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407994/normal_60066581bb78e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412159/normal_5ff2b3df54037.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392661/normal_5fed813e31bc9.pdfIn PDF document text
    • https://cdn.sqhk.co/zidezofa/MhemmyU/84299550956.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500883/normal_5feed76b34d4e.pdfIn PDF document text
    • http://lonotel.mygamesonline.org/vuvabeb.pdfIn PDF document text
    • http://fapasevusiledap.mygamesonline.org/wawadew.pdfIn PDF document text
    • https://cdn.sqhk.co/worupageke/sC2Fgjd/sepejelivududowitarajo.pdfIn PDF document text
    • https://cdn.sqhk.co/metumolalub/Hjbje9l/juweponaxadovefima.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419424/normal_603402273fd69.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7605d98d-8b17-4a41-9383-f5c8d5af9bcc.filesusr.com/ugd/2bed4c_783e7f3ad88f4e56800f856ca2c2b3bf.pdf?index=trueIn PDF document text
    • https://101c3d73-5e22-4da1-a203-a3a2a794ce88.filesusr.com/ugd/69a512_e9b34bad72d14c58a5bd1db8afb53345.pdf?index=trueIn PDF document text
    • http://dapizodipe.myartsonline.com/sizixakojatuvijo.pdfIn PDF document text
    • https://75e6d08a-b14f-4c2c-bd4e-3e6431d9d11c.filesusr.com/ugd/497a87_da8e0ffdd3334709a764b41cb2e0144a.pdf?index=trueIn PDF document text
    • https://b2d1eea7-aef5-47fc-962c-88b5513ecafc.filesusr.com/ugd/3a57bc_0cecb4d3333e423d961ef2616a5c6b74.pdf?index=trueIn 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_off0000e631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE631 5568 bytes
SHA-256: bb30e45b5b32558957cf05fbbc0c2a4e97c7447ce3be1d5d70f4514ca9739ad4
font_01_sfnt_off0000f928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF928 11280 bytes
SHA-256: 2e7e9c0e1384416ef2edc04155e16b0567a7af94708113546fb34ba3b4b65583

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