Malicious PDF — malware analysis report

Static analysis result for SHA-256 45bedec55e639aa6…

MALICIOUS

PDF

170.6 KB Created: 2021-03-18 02:09:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6651a1c5bb8920c31f7f5f0955111667 SHA-1: 2bf4bc5d5e5be50e27fbc02078fef3df72869604 SHA-256: 45bedec55e639aa6d4c53ef5f05429437ec65eac9d9e0baf13a09f17724f522d
146 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. It uses a callback-phone (TOAD) lure. 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 0.9986

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://jottigo.ru/wix?keyword=fort+derussy+parking+directions PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4478946/normal_5fef7cc1a7af3.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisimak/kuiaOna/droos_online_tutoring_platforms_uk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412606/normal_603b4ebae1715.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484355/normal_5fcbc64a528f4.pdfIn PDF document text
    • https://cdn.sqhk.co/vufebevefo/xVqghja/rutofajakegawafe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392867/normal_6016e41501406.pdfIn PDF document text
    • https://cdn.sqhk.co/rivinodati/aoQsjb8/zovadifuvupi.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwadezab/jfjdijs/37083847735.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478438/normal_601c689e5317a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428078/normal_603078ddab648.pdfIn PDF document text
    • http://tofogabe.iblogger.org/sas_proc_logistic_ods_output_example.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428078/normal_5fd03edc4e6a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411708/normal_5fcc4d6b43920.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444647/normal_604a75e1d9a76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380675/normal_60527d2451468.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366341/normal_602f35470cb56.pdfIn PDF document text
    • https://cdn.sqhk.co/navotezive/g7igzhb/custom_post_it_notes_3m.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bumilamufitilu.epizy.com/zemixuguzobutan.pdfIn PDF document text
    • http://duvipegi.epizy.com/35709115931.pdfIn PDF document text
    • http://fewetero.epizy.com/bacharach_fyrite_pro_analyzer_manual.pdfIn PDF document text
    • http://wowulikuvej.rf.gd/83056094246.pdfIn PDF document text
    • http://vusevupitiwo.rf.gd/sibovoligomisijadokuf.pdfIn PDF document text
    • http://bifakafuwal.rf.gd/zizapusobufedurutibimo.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_off00026094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26094 5328 bytes
SHA-256: 2ab133a4c3ccabd79a71ba7f1cabad826ac66f6356ca56bb1cad7015d87db6de
font_01_sfnt_off000272d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x272D9 11656 bytes
SHA-256: a11832ba13fa762e72ccdcb14c586191892f591917699b1e042a9a3882a4c379

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