Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ad80474fd7698d6…

MALICIOUS

PDF

84.2 KB Created: 2021-04-01 10:27:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc66e218df8a1621b9a1f30ba1ac21b9 SHA-1: 7aff058a599069567ee71beff0d4d2939d4f5891 SHA-256: 5ad80474fd7698d660a762c3a0390ae3f1dc06f6ab3b7935adcf13664faa3a7d
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan-like behavior. It contains a large number of external links, a common tactic for SEO farms or phishing campaigns. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://botokaw.ru/wix?keyword=kirby+vacuum+carpet+cleaner+manual
    • https://cdn-cms.f-static.net/uploads/4408324/normal_5fd3391653d3e.pdf
    • https://cdn-cms.f-static.net/uploads/4501962/normal_601978438ad59.pdf
    • https://cdn-cms.f-static.net/uploads/4492573/normal_601f08859e3ba.pdf
    • https://cdn-cms.f-static.net/uploads/4374542/normal_60122b8d6101e.pdf
    • https://cdn-cms.f-static.net/uploads/4453579/normal_602e3de0210bb.pdf
    • http://dazixetenulega.22web.org/suspicious_activity_report_uk_template.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://mifofiz.epizy.com/78534932218.pdf
    • https://e905a76e-7bc1-418c-be29-e8eda1603e86.filesusr.com/ugd/3fb32a_ccf6b37689aa49db96cc8fd8cea83482.pdf?index=true
    • https://s3.amazonaws.com/juzinaramip/chaud_froid_performance.pdf
    • https://178fd8f3-986e-459b-a431-83c1f58eadb8.filesusr.com/ugd/7a8e82_ce671285be0f42639ae7591c5df367b7.pdf?index=true
    • https://1ebfeea1-7d02-43b8-8f0a-002c87bc7f75.filesusr.com/ugd/50dcf6_fb7908195c45443b83ab83dab4b4d6ba.pdf?index=true
    • https://e809654a-a95b-4dbc-a338-24085255a2f8.filesusr.com/ugd/1b6cec_05363a62c4e7441b8a614eaf6b643578.pdf?index=true
    • https://uploads.strikinglycdn.com/files/89faec04-c04f-435b-96ae-3c7a02980d40/39730320444.pdf
    • https://uploads.strikinglycdn.com/files/156a0975-9ef6-495f-a51a-9ef39297b249/the_devil_wears_prada_full_movie_free_123movies.pdf
    • http://pabovabavuwemet.rf.gd/pokemon_games_for_android_gbc_emulator.pdf
    • https://uploads.strikinglycdn.com/files/00c002fd-9edb-43f9-81e9-1023da9e8fb1/7616244094.pdf
    • https://s3.amazonaws.com/wulotugadag/puvewukafu.pdf
    • http://wabanatebaxu.epizy.com/is_love_is_a_fallacy_a_logical_story.pdf
    • https://uploads.strikinglycdn.com/files/c9fb14b6-574b-44c2-a61d-413149007e30/58483341977.pdf
    • https://uploads.strikinglycdn.com/files/5f943ace-59c8-4508-9467-47518c755d05/resistor_color_code_calculator_download_for_pc.pdf
    • https://b6de9e3f-c562-4e05-b5ee-70895c8060ae.filesusr.com/ugd/3801ff_6aca0ac2340b4dcfbd359e9f3675ff85.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010bb1.bin
50c438820c089d07b7d76c8f6c0596aba70c292c1688e9db5ed5c722eeb896b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB1 5172 bytes
font_01_sfnt_off00011d44.bin
4e2fe88dc1863a01e463df4cebccacdc130b73dab43fa4fdd73df698151295d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D44 11200 bytes

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