Malicious PDF — malware analysis report

Static analysis result for SHA-256 4899f5e6e4fe7e5d…

MALICIOUS

PDF

76.9 KB Created: 2021-05-04 10:04:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d2e4fb67ff8b71133cbc84ea2e117177 SHA-1: 711829de417480ba051bf7f40e9d49b5a8c22081 SHA-256: 4899f5e6e4fe7e5d860a11902d35afbd1784292beedf4ca446559b363d724426
186 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. 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 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 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://dafemum.ru/strik?utm_term=onkyo+tx-nr515+price+in+india PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4474456/normal_6023e37a67989.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465149/normal_6029e8609ac86.pdfIn PDF document text
    • http://findssldz.xyz/wubovipekezolafexorkqmi4.pdfIn PDF document text
    • http://fruit-ital.space/towemizerazobigasejisu4kyh5.pdfIn PDF document text
    • http://mikrotikwizard.com/management_theories_and_modelsh3qs2.pdfIn PDF document text
    • http://arthromedro.xyz/your_wish_is_your_command_part_97ad08.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4768f87-f584-48dc-8a3f-9e367d8e632d/super_mario_sunshine_2d_download_apk.pdfIn PDF document text
    • http://soreras.epizy.com/stock_ageing_report_format.pdfIn PDF document text
    • https://6f84c080-6bd2-4154-8ce1-0e390380bda5.filesusr.com/ugd/defdb4_fe4729fd40b44b02aa49c4591db1f71f.pdf?index=trueIn PDF document text
    • https://d89a15f7-21b5-45f0-b9b4-bc5b7be68842.filesusr.com/ugd/18e821_a2530755a4f84ebf8ae7c4cca296a00c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/df508cd3-3e0d-4df8-9dd9-9e3d9416a5c1/how_to_use_haier_water_heater.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bad49a9a-8108-423c-91f2-6a287f1593a7/dunkin_doughnuts_wake_up_wrap_calories.pdfIn PDF document text
    • http://vejesigivilowen.rf.gd/85378964591.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64ac5d1f-5149-4f62-b5ee-3b67106deb6c/vitamix_e320_blender__pca_package.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fe02ffe-9ee8-4793-9097-9b5d74a9cb01/pevojusamupozakavevoro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86580c23-1e86-4e0b-9c4f-9eb6562c2dbf/best_free_mixing_and_mastering_vst.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDB 5324 bytes
SHA-256: b81d79951ce03d43d55491cccec847e84118e4cd4cbfe8c3defdef75730d2d7c
font_01_sfnt_off0000fe24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE24 11452 bytes
SHA-256: 8f4ad6e8dce7a23127aadee0d01d5dc21c542173f937389338121c65bfc34a1a

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