Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9ac0260cf6674b2…

MALICIOUS

PDF

79.4 KB Created: 2021-04-07 21:05:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: adb5467e1a6836cbeda729c027bf7785 SHA-1: ede091130fe19a73ac8e9847af84ae704d837165 SHA-256: e9ac0260cf6674b2b355315a2f0698160e5c1e05bde6b7c2b4fb6dacdd110dc9
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. The embedded document body text is heavily obfuscated and appears to be metadata rather than user-readable content.

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 http://suzofovolavuk.scienceontheweb.net/viwowofewekojoforofur.pdf In PDF document text
    • https://tefegori.weebly.com/uploads/1/3/1/6/131637168/dutevigimuzivas.pdfIn PDF document text
    • https://jaweditulopo.weebly.com/uploads/1/3/4/3/134313576/b3bfdb994b.pdfIn PDF document text
    • http://zisuroto.mygamesonline.org/rawulizukebobu.pdfIn PDF document text
    • http://kozugufasuroti.mygamesonline.org/poxavatakij.pdfIn PDF document text
    • https://safipeta.weebly.com/uploads/1/3/1/4/131408280/karijef_zufopif_vezetutanofamo.pdfIn PDF document text
    • http://dutarotanazosuv.medianewsonline.com/is_the_green_mile_a_short_story.pdfIn PDF document text
    • https://renokogepebamon.weebly.com/uploads/1/3/2/6/132696434/zidarivofuzuz-tiroxefaligug.pdfIn PDF document text
    • https://zowololo.weebly.com/uploads/1/3/5/2/135294949/pakenux-nixeletisapa.pdfIn PDF document text
    • http://pifumufupes.iblogger.org/699269858.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/WboozbXZlIE/wb?keyword=2010%20dodge%20journey%20user%20manualPDF link annotation
    • https://923a8ca3-316b-4844-b38f-9bc955ad4852.filesusr.com/ugd/312e0e_9576de723f234bcf80bf85a37b9e0e75.pdf?index=trueIn PDF document text
    • https://f84ffea9-2755-49c2-9cb5-47ca8b55fe65.filesusr.com/ugd/0adedf_64d6e1da2e5b47cea5ced00dec57baa2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bupijila/lolebewaxab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c08b366c-9d6f-4fe1-8701-ca87c7ec8d40/jamevupalufegefavipudaban.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/bootstrap_contact_form_design.pdfIn PDF document text
    • https://8cff94d3-ecab-4ea5-ad27-d3e67d02fd32.filesusr.com/ugd/2813e2_f05c1eddd31d41048e9ef81e0dddda92.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/jowibifusivewobo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9894a717-962a-4ec0-97ba-58e1c7cd5a74/xerisesinaxamelip.pdfIn PDF document text
    • http://perevis.epizy.com/24711106808.pdfIn PDF document text
    • http://zadabodemuliju.epizy.com/algebra_2_solving_inequalities_worksheet.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_off0000f6dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DD 5552 bytes
SHA-256: 0a2f4523f6c51bee5faee0a9fa06fafa989a0610ba2f019d3ad14c68d1277b93
font_01_sfnt_off000109b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B7 11232 bytes
SHA-256: f27380196b4b03349dd5020e2f7d66c64ac6f2c795a11a3dceac30b7588e6d2c