Malicious PDF — malware analysis report

Static analysis result for SHA-256 74e15ffed8a8734f…

MALICIOUS

PDF

72.8 KB Created: 2021-01-13 23:31:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: af6279490151ec11fb008d90e89eaf67 SHA-1: 77a8e2e59ce2852cd6f3ad1fa5420c4c9d8b504c SHA-256: 74e15ffed8a8734fa4791506e30002c0ae35d2efd37046cd884d27ceb61504f1
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely serving as a lure to a phishing or malware distribution site. No scripts were extracted, but the PDF structure itself facilitates the attack.

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 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://traffnew.ru/123?utm_term=the+perfect+girlfriend+cast PDF link annotation
    • https://site-1166064.mozfiles.com/files/1166064/sch_bi_tp_ting_anh_7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380229/normal_5f8c9720433cb.pdfIn PDF document text
    • https://site-1175908.mozfiles.com/files/1175908/tepopebavifosugokefaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377647/normal_5fe1135e6d49e.pdfIn PDF document text
    • https://site-1178504.mozfiles.com/files/1178504/sirolimus_side_effects_kidney_transplant.pdfIn PDF document text
    • https://site-1177392.mozfiles.com/files/1177392/17258484319.pdfIn PDF document text
    • https://site-1180109.mozfiles.com/files/1180109/az_rock_and_gravel_wholesale_supply.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457302/normal_5fbca104300bc.pdfIn PDF document text
    • https://site-1179389.mozfiles.com/files/1179389/xudajiseve.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392647/normal_5fd6589bdf561.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488842/normal_5fdbec83afde9.pdfIn PDF document text
    • https://site-1166605.mozfiles.com/files/1166605/92899633536.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/novifamigot/92082592510.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/ios_app_store_games_for_android.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_off0000de00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE00 5368 bytes
SHA-256: 50fac369cfc0681440654c845fa18c97f92da3cfdfce7d1310f47605589b0c6b
font_01_sfnt_off0000f039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF039 11684 bytes
SHA-256: 0e0d70cb8713902baad9174760f24d3677e7602b71e6cbedc63891bee8c56705

Open this report in the interactive analyzer, or submit your own file for analysis.