Malicious PDF — malware analysis report

Static analysis result for SHA-256 89dd409328d5e65a…

MALICIOUS

PDF

72.8 KB Created: 2021-01-15 17:46:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f991bc8ef8b5090fb86afea3b4d39d02 SHA-1: c66d0b8302ee66ad26f421278c121d310ac09d59 SHA-256: 89dd409328d5e65a90abbbbeb474da73775d34d41947ebc0acff671c6ce0b8d0
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many pointing to other PDF files hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

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://trafffi.ru/123?utm_term=ingenuity+washable+playard+deluxe+%2526+dream+centre+-+emerson PDF link annotation
    • https://site-1176277.mozfiles.com/files/1176277/commander_in_chief_of_the_u__s__military.pdfIn PDF document text
    • https://nolipugi.weebly.com/uploads/1/3/4/6/134652161/vujusamo.pdfIn PDF document text
    • https://cdn.sqhk.co/ponesigis/pgfgj2A/smurfs_village_cheats_android_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385612/normal_5f8d6517bbdb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470826/normal_5faaa5504d21d.pdfIn PDF document text
    • https://damijuvik.weebly.com/uploads/1/3/1/3/131381376/760767c0f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478655/normal_6001a9155c5af.pdfIn PDF document text
    • https://zoxaminajoge.weebly.com/uploads/1/3/1/6/131637873/rebakomexusiso_zemagelarew_xituvuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372985/normal_5f889bede1641.pdfIn PDF document text
    • https://cdn.sqhk.co/sifolilo/GsPiciQ/troll_face_quest_silly_test_level_23.pdfIn PDF document text
    • https://ludodufapagita.weebly.com/uploads/1/3/4/6/134616483/13e5ab5510c.pdfIn PDF document text
    • https://cdn.sqhk.co/zejizoguzut/ichbgfZ/jeredogowul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366652/normal_5f8c3cc15f577.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488339/normal_5fd12b18bceb3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000df62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF62 5560 bytes
SHA-256: a9b1a110f50ec7f23e48ea183350d42383c2f62a0b6f5a3230245fedf309cad8
font_01_sfnt_off0000f25b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25B 10528 bytes
SHA-256: 08f9426d64e2d8ba95f644bfaa882ac3eb41f44ed886c94d5d0e451220faa38e

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