Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec12cca3a7d6de77…

MALICIOUS

PDF

85.4 KB Created: 2021-02-22 00:08:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 5138f37d91f7e120edc1b8f46d6577cb SHA-1: 712ef3f9b2a339665d9eeeb97ce41862c4ebdb54 SHA-256: ec12cca3a7d6de7787d0fdfb8c51844efb6347098b4c0738baed434e62797735
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the overall structure indicate an attempt to redirect users to potentially harmful external content, likely for phishing or malware distribution.

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
  • 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.
  • 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=anna+todd+after+5+read+online PDF link annotation
    • https://pamaxorakumi.weebly.com/uploads/1/3/4/0/134019068/8725491.pdfIn PDF document text
    • http://proflist-briansk.ru/lapuvusis0axc.pdfIn PDF document text
    • http://forecast.bet/zirotezana5r415.pdfIn PDF document text
    • http://verification-help.com/vepevipuwolupafalizop3qvc2.pdfIn PDF document text
    • http://centerbluebadge.com/66794603583wn4nr.pdfIn PDF document text
    • http://pro-komp-master.website/16659318413d8riq.pdfIn PDF document text
    • https://xaxidotuviw.weebly.com/uploads/1/3/0/9/130968933/6514762.pdfIn PDF document text
    • https://jagusidenoz.weebly.com/uploads/1/3/4/9/134902343/0131e6413d40.pdfIn PDF document text
    • https://jorosovepi.weebly.com/uploads/1/3/4/7/134706332/9bb82994eff.pdfIn PDF document text
    • http://supernefritroller.xyz/oasas_justice_center_reportingop820.pdfIn PDF document text
    • http://ionatr.fun/ligelepnvrfo.pdfIn PDF document text
    • https://tujarabevazedi.weebly.com/uploads/1/3/4/2/134235746/womigonivez.pdfIn PDF document text
    • http://hookup754.fun/30375957095vclsw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/samisixalegidevufe.pdfIn PDF document text
    • https://s3.amazonaws.com/tafogusegabomu/gebevab.pdfIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F5 4836 bytes
SHA-256: 166267d896a780e8279f6ad666807ac89760d6879b6e2d8644b9a383ad59c358
font_01_sfnt_off0001067d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1067D 14004 bytes
SHA-256: 33d08d03f8024f0eb9ba090cf94a4983ff5942f3236ecb01bcbc73e449973660
font_02_sfnt_off000132d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132D0 16188 bytes
SHA-256: 357b6184bc20a3f7449b02d77f6fdbcc15c38ba9f4c11aa94ffbf0c2f0ff3bf3

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