Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aaaa4282f1d6955…

MALICIOUS

PDF

78.9 KB Created: 2021-03-18 11:13:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3d38302231d03a0c10a1285cb46b9a59 SHA-1: ec232244d93ef4e10ad2b2befd4d0033e53a6c87 SHA-256: 0aaaa4282f1d6955a6823cee846998892d68a0121efd2458e2c6f42afe2037a9
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-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://mezovuduw.ru/strik?utm_term=oster+dehydrator+instructions PDF link annotation
    • http://usblighter24.site/biwiburamuxitazodomugewaz19xnt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382418/normal_6012dc9b46a74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448986/normal_600a3dba628c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454678/normal_600d14d6d7129.pdfIn PDF document text
    • http://detonic-ro.website/blood_pressure_cuff_placement_on_arm1lazm.pdfIn PDF document text
    • http://shlifovka-pol.website/john_deere_x300_mower_deck_belt_replacementignos.pdfIn PDF document text
    • https://setejurisu.weebly.com/uploads/1/3/2/7/132740540/wavinito.pdfIn PDF document text
    • http://foyou.store/dujukizazj7zig.pdfIn PDF document text
    • http://springital.fun/sapuvigajikiwasarubae1sm6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502464/normal_5fcec02634f23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489245/normal_6028ba35329ab.pdfIn PDF document text
    • https://fojobalulebutot.weebly.com/uploads/1/3/4/6/134697339/3931063.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412394/normal_5fd7a37c505c2.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/jipowumat/coast_guard_weight_standards_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/most_addictive_games_android_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b1f5dbe-5410-4750-ac3d-534dd0188229/paint.net_transparent_background_plugin.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/dojegedorenumurezanu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcc35ccf-bb96-434d-89c3-23f8428c60a1/56222269327.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/ukulele_canon_in_c.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c315fb01-0861-4b02-ae21-ca68bd5d9714/how_to_install_tp_link_powerline_adapter.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_off0000f891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF891 5124 bytes
SHA-256: 023e2c897aaad695f8e2adcfe0789e7bb7fff2305de82e58356c1ed649649f27
font_01_sfnt_off000109f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F7 10780 bytes
SHA-256: cce12ed0773a497c259a68bc90586e5f93c6dfc7098e7e9ff458368fe18c0904

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