Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3419f8d38b9aa4f…

MALICIOUS

PDF

67.0 KB Created: 2020-11-14 15:43:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1dab60da445b75096bce3a7b2d4e29c4 SHA-1: d8e27b7f693d0b922db7f4f4bf3c29d33df55218 SHA-256: e3419f8d38b9aa4fed4ee98bf43bfd51a0f19a618c21fac6054c763f0018537e
156 Risk Score

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 0.9998

Heuristics 5

  • 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.
  • 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://trafffi.ru/123?utm_term=rival+ice+cream+maker+gc8151+instructions PDF link annotation
    • https://xukusoresi.weebly.com/uploads/1/3/4/4/134488105/351405634ea9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427076/normal_5f9bb56364270.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382965/normal_5f986cbe593ae.pdfIn PDF document text
    • https://zavigajigufuf.weebly.com/uploads/1/3/1/6/131637719/waxus-sozetu.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/panalipolifod/fallrim_tools_skyrim_se.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/31316306029.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/57122511004.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6a89c07-1ff8-47ec-8413-d10d8da1f1a4/berserk_band_of_the_hawk_behelit_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/legally_blonde_costume_design.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e474bc1b-22f6-4754-976d-eba1d1bdff0b/jithu_jilladi_download.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/xonitaxefusedokiregob.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/apeman_c450_dash_cam_manual.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_off0000c954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC954 5620 bytes
SHA-256: 14b262203006a8b6918c254d1d5ff80a68f941d774de639b70204df323ebf1e8
font_01_sfnt_off0000dc75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC75 10216 bytes
SHA-256: 8819fa2152283fb27c82f3f4d9d3903dcb4f44835c4da88020430a8a2d5cabb4