Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7f8510a121ffe0b…

MALICIOUS

PDF

77.6 KB Created: 2021-06-01 02:35:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b9357b68d623492db46284d42c4fa4e SHA-1: d24ccb15e8a2048a78bae321d3e9d23a2c5fa12b SHA-256: d7f8510a121ffe0b69950d8b442bca8343ee6f5b0a699e55e6a08def45e1e2f1
156 Risk Score

Malware Insights

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

This PDF document 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 primary URL points to a resource that appears to be part of a SEO manipulation scheme or a lure for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crysiq.ru/pbw?utm_term=realistic+group+conflict+theory+explain
    • https://cdn-cms.f-static.net/uploads/4452853/normal_6013ac182f6e9.pdf
    • https://gopufiraw.weebly.com/uploads/1/3/4/5/134590690/976fff.pdf
    • https://warubexe.weebly.com/uploads/1/3/4/6/134647576/4927661.pdf
    • https://vepovadubit.weebly.com/uploads/1/3/2/6/132696500/bazeg.pdf
    • https://jowiroluka.weebly.com/uploads/1/3/4/3/134336896/8974329.pdf
    • https://lekorasosin.weebly.com/uploads/1/3/4/6/134612915/lusipisufar-zojimamaxedizi.pdf
    • https://cdn-cms.f-static.net/uploads/4449170/normal_606c246337401.pdf
    • https://siteketu.weebly.com/uploads/1/3/4/3/134362374/faxakozosimu.pdf
    • https://zetidepip.weebly.com/uploads/1/3/4/4/134432407/5844196.pdf
    • https://cdn-cms.f-static.net/uploads/4490930/normal_602d6886c8865.pdf
    • https://cdn-cms.f-static.net/uploads/4365562/normal_603ac3276ccb2.pdf
    • https://cdn-cms.f-static.net/uploads/4446263/normal_6066ad4268c8d.pdf
    • https://zaniwobomivefo.weebly.com/uploads/1/3/1/4/131406480/rozebamovitevof.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://viluxese.pbworks.com/w/file/fetch/144428703/92116844867.pdf
    • http://kapetipubi.pbworks.com/w/file/fetch/144426582/chapter_1_their_eyes_were_watching_god_quotes.pdf
    • http://jajisaparev.pbworks.com/w/file/fetch/144418614/what_are_the_best_types_of_coffee_beans.pdf
    • http://xalomuzavege.pbworks.com/f/79598272258.pdf
    • http://fuvesiwowegu.pbworks.com/f/43284841381.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f084.bin
1303e2c3ea51dbad95bdce7b975232fe49863f6e0eb913652065071363aa1d63
pdf-font-stream PDF embedded font (sfnt) at offset 0xF084 5452 bytes
font_01_sfnt_off0001031d.bin
0cec2c03a61b938667ffa18d9adc8d9036a42064861598cf6197933af6b003df
pdf-font-stream PDF embedded font (sfnt) at offset 0x1031D 11168 bytes