Malicious PDF — malware analysis report

Static analysis result for SHA-256 d651e7299b20c4f2…

MALICIOUS

PDF

80.1 KB Created: 2021-04-02 00:45:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2f22850c5452f510e0055427327e29f6 SHA-1: 1d225cd80e0060885a7749575d226f36e5010777 SHA-256: d651e7299b20c4f22dab31ba3838d8e6f1a3a4de01b6dd4eae10067825a94bf6
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/aws?utm_term=meade+%2523497+autostar+hand+controller PDF link annotation
    • https://gepidoduxaw.weebly.com/uploads/1/3/5/3/135324144/9ba205.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448126/normal_605f4a094fa71.pdfIn PDF document text
    • https://kukasoxijosip.weebly.com/uploads/1/3/4/4/134431535/1635830.pdfIn PDF document text
    • http://lizakoku.22web.org/zaxas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489598/normal_5fe7572a3a4f4.pdfIn PDF document text
    • https://suzigenetulaja.weebly.com/uploads/1/3/4/7/134756603/f7210.pdfIn PDF document text
    • https://niritopep.weebly.com/uploads/1/3/4/6/134634222/kukamisobomeriw-ruwomotedefuki-lidux.pdfIn PDF document text
    • http://zasasibibo.iblogger.org/51968941665.pdfIn PDF document text
    • https://rugexivik.weebly.com/uploads/1/3/1/0/131070765/ginufisixobexaj-giwisedej-kivivevunokexuv-nuxura.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500893/normal_60384dafe5f43.pdfIn PDF document text
    • http://riwejurefuwubep.iblogger.org/7_ages_of_man_poem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428083/normal_604b88e94c862.pdfIn PDF document text
    • https://xanusikufugab.weebly.com/uploads/1/3/4/3/134371049/3fdf7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://welavosapo.rf.gd/formal_and_informal_language_worksheets_3rd_grade.pdfIn PDF document text
    • https://2dcb0092-dd22-4cef-90c1-8c398f802bb7.filesusr.com/ugd/ff3115_12172ee48dcb4a46a3356ce4710a65a2.pdf?index=trueIn PDF document text
    • http://lulasiwafa.rf.gd/wusupuremifajuvegi.pdfIn PDF document text
    • http://podozedomusajor.epizy.com/what_does_capped_brood_mean.pdfIn PDF document text
    • https://7a1f2a0d-094a-4466-88af-72a4af93b9fa.filesusr.com/ugd/22739b_678889336a43423ea6ec1191902c43fd.pdf?index=trueIn PDF document text
    • http://jumiwamajep.rf.gd/ancient_egypt_civilisation.pdfIn PDF document text
    • http://vopimivukaf.epizy.com/muwaxifedogekilalot.pdfIn PDF document text
    • http://sojizodujibibo.epizy.com/10726859042.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fda9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA9 4512 bytes
SHA-256: ab94bd49d0e6a4b10f199bfccad35e2c759f03062adfebd561f8ceeaa7759cff
font_01_sfnt_off00010d16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D16 11436 bytes
SHA-256: 780956e4e331525d3730999a5f0eee0fdd52064c7d2e09ccfb72721c15922597

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