Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2d0bea8b658570b…

MALICIOUS

PDF

74.6 KB Created: 2021-03-20 05:25:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 875ac83422d9df154f0b198e0944c110 SHA-1: 97c4d086ee306e6f9a74d69b76358e6c67b77681 SHA-256: c2d0bea8b658570b4080afad287b04b49ecc8087339cd24fa4a32529bfdffce3
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 phishing or malicious intent. The document contains a large number of external links, suggesting it functions as a link farm to distribute traffic to various sites. The embedded URLs and the document's structure strongly suggest it is part of a phishing campaign designed to direct users to potentially harmful 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://fokemale.ru/123?utm_term=bts+love+yourself+answer+english+translation
    • https://cdn-cms.f-static.net/uploads/4410441/normal_6047dd111c4fd.pdf
    • https://cdn-cms.f-static.net/uploads/4389095/normal_603d1f462870f.pdf
    • http://wimazosuwoxugij.66ghz.com/rebuttal_letter_format.pdf
    • https://cdn.sqhk.co/wopidevepip/1cQ5P4Z/62994488452.pdf
    • https://static.s123-cdn-static.com/uploads/4383586/normal_5ff294e9c0ac5.pdf
    • http://korirojasutito.22web.org/top_10_american_short_stories.pdf
    • https://cdn-cms.f-static.net/uploads/4479902/normal_6017676796025.pdf
    • https://powumebaporisav.weebly.com/uploads/1/3/4/8/134891471/5203031.pdf
    • https://cdn-cms.f-static.net/uploads/4409394/normal_604db7719d679.pdf
    • https://xubebivox.weebly.com/uploads/1/3/5/3/135392957/xikafopozikegu-zupabuwujodetum.pdf
    • https://cdn.sqhk.co/wijelukifap/jfic1ii/39058683965.pdf
    • https://monijakuxit.weebly.com/uploads/1/3/4/3/134362478/4b55c942.pdf
    • https://cdn-cms.f-static.net/uploads/4378831/normal_60146744644cf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zarelusipofox/esc_guidelines_heart_failure_diabetes.pdf
    • https://s3.amazonaws.com/divelikubapiwaj/25693287643.pdf
    • https://s3.amazonaws.com/wajufifenoxuj/matopida.pdf
    • https://s3.amazonaws.com/redegelesibif/dorexerawanotuwijexevafu.pdf
    • https://s3.amazonaws.com/biwuwukesazef/2019_games_list_android.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_off0000e5b8.bin
a8e1c10745e745ee85f51324afafdef455c966ad8460662489095d9b2ffcd38d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B8 5332 bytes
font_01_sfnt_off0000f7f4.bin
46cc822669052e95a5aa1053c42169fc26b61e1851261365d7ebce6c32882523
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F4 11032 bytes