Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d638f7c899cac96…

MALICIOUS

PDF

96.4 KB Created: 2021-06-07 20:40:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4acea3411ab39e457486296cf2be1db0 SHA-1: b7a69f16c47bd3f14a3dbf45de095d9f181b8a10 SHA-256: 6d638f7c899cac96707d5069835563f603971b2b994d8055a869ad08eed931c1
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 0.9985

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://vilenefex.ru/123?utm_term=bimanual+task+meaning PDF link annotation
    • https://novenoberube.weebly.com/uploads/1/3/0/7/130776641/fitifigopojam.pdfIn PDF document text
    • https://tokebezewala.weebly.com/uploads/1/3/3/9/133999388/2187d80ff2447.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4475406/normal_60b0a3e202592.pdfIn PDF document text
    • https://xoredanixeg.weebly.com/uploads/1/3/0/8/130814516/582b39f742e87.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499995/normal_5fc8347e181d0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409814/normal_6006719343b04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473651/normal_60370ca926073.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486982/normal_6063dd2c68062.pdfIn PDF document text
    • https://xeveguxugagu.weebly.com/uploads/1/3/4/6/134600238/defoxi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9b49251-3ada-49da-a681-e98622b71548/41242128898.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e429342c-99e8-48f0-94d9-663145a043bc/is_dbt_therapy_effective_for_ptsd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd4d26bc-48d3-4066-845a-382df0603660/92349413143.pdfIn PDF document text
    • http://fixiguru.pbworks.com/f/nifagokosis.pdfIn PDF document text
    • http://fepewuwakow.pbworks.com/f/hojas_de_multiplicaciones_para_resolver.pdfIn PDF document text
    • http://nosiravuga.pbworks.com/f/33438387165.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2582e554-388a-4d73-b038-28804c5e5a1b/likukoviwuxisinuwolazeve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9d08085-1ceb-4593-8ed8-60ed07e9e866/vogupugaxutadegowavig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/779fa84e-e58c-4070-bec8-5b4294f76da7/lazuso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/217756e9-ebb1-4dce-9fae-543fb346ef3d/the_wheel_of_time_book_12.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d86e184-b31b-4a0c-a95e-73afd6e79a6a/28832080411.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7ddc2d4-ee58-4ea2-83a0-6c9f7aee9338/why_will_samsung_dryer_not_start.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a1e8ad2-c5ff-4195-a2ae-ac72de281ff4/suzubekavoluxosuvo.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f69e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69E 4064 bytes
SHA-256: 868b40fc185ee97b90cddfc762f666ae5c344fed29bb61aa87b5c87a5ff39ee4
font_01_sfnt_off00010518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10518 5024 bytes
SHA-256: dc9b67a7ec6984fce5fcc96e0c05a96adf3a173783eb0bf65d92531725d86ab0
font_02_sfnt_off00011617.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11617 3700 bytes
SHA-256: cf866898fde4ec01eb3c46c6351024dac25a6d4822a867e3c0361e5cc2b87326
font_03_sfnt_off0001247c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1247C 12488 bytes
SHA-256: 667ec3f878895e8b2526aa0e446a107e7459428671ebcfa4a2ce9f579db5e790
font_04_sfnt_off00014ce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CE5 16632 bytes
SHA-256: 4bd9aee878723c01ef0f87dde35b5bb432df839cda3b7d45f6649a53c8e0f4dc
font_05_sfnt_off000163df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163DF 3540 bytes
SHA-256: 572ff8281e4f522a5f08ce8e8049b6913ac2683501f03ecde6c7247d7afb1c15

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