Malicious PDF — malware analysis report

Static analysis result for SHA-256 028217c7f0adbc70…

MALICIOUS

PDF

82.7 KB Created: 2021-02-20 12:30:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: c812ae267f51451db3b53176945a9458 SHA-1: 27ffdb0592cd7fbed5c166767584dfb440ecc846 SHA-256: 028217c7f0adbc70ec901964e8f58116825fb2e82b857c1fb937530221e67405
186 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The document body, though heavily obfuscated, appears to contain keywords related to car prices, likely as a lure to attract victims to the malicious URLs.

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://maypoin.ru/strik?utm_term=maserati+quattroporte+2012+new+price PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4491673/normal_5ff29f8824f99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495841/normal_600f818927ff6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383444/normal_5fd3188fb1829.pdfIn PDF document text
    • https://vimasideb.weebly.com/uploads/1/3/3/9/133997972/90f5d0d9a53.pdfIn PDF document text
    • http://zalavsky.ru/3773906271p9ice.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374984/normal_6026cf23b6ad8.pdfIn PDF document text
    • https://nevofegef.weebly.com/uploads/1/3/4/8/134851200/2d15567559ce.pdfIn PDF document text
    • https://gifiboluf.weebly.com/uploads/1/3/2/6/132681188/nokuviralinusubu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472491/normal_5fc996b7b45f8.pdfIn PDF document text
    • http://velesvoyage.ru/daranoxeruzoraxafikajibumwcr6.pdfIn PDF document text
    • http://streamsweets.com/5430142177038zby.pdfIn PDF document text
    • https://kofudavobew.weebly.com/uploads/1/3/4/6/134602163/165e166c.pdfIn PDF document text
    • http://astrology-personal.online/telecharger_vcus_pour_androidw1chu.pdfIn PDF document text
    • https://xuvodovujekezoz.weebly.com/uploads/1/3/5/9/135957716/4fd928.pdfIn PDF document text
    • https://funogumoduwe.weebly.com/uploads/1/3/4/3/134309977/pizuvomobo_giluxinoz_bepux_gijasabogu.pdfIn PDF document text
    • http://storeeu.info/apache_pulsar_sql8xa31.pdfIn PDF document text
    • https://vepemetamat.weebly.com/uploads/1/3/4/3/134354227/bexesobogevakodi.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/gatazeromij/answers_of_menschen_arbeitsbuch_a1._2.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_off0000db01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB01 5444 bytes
SHA-256: 980e9d4f2d9b2bb92e2c31a280296fb460f4d59dea2de45f35f768bf665a1caf
font_01_sfnt_off0000edbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBF 12320 bytes
SHA-256: 0260a7561d13e840101ac8972e8d3aedbde4aac6eaac1747efb7f87ccd402413
font_02_sfnt_off000116d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116D9 21980 bytes
SHA-256: 8be5a20854174ba74883c4af77ae939267cb73498e61f40187bf3239069aa12c

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