Malicious PDF — malware analysis report

Static analysis result for SHA-256 f002fa0bb3b0e220…

MALICIOUS

PDF

73.5 KB Created: 2021-05-02 00:08:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c0b8c819ed8baee189c2d6049908392f SHA-1: 79155cecadc16f442bcf968d5ea4c8a6b7ca26af SHA-256: f002fa0bb3b0e220b2140b907558274f4482fe64a096af48855010e5b47c557e
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, and is flagged by ClamAV as Pdf.Phishing.Trojan. The embedded content, though heavily obfuscated, suggests an attempt to redirect users to malicious or spam-related websites. The primary lure appears to be a search query related to religious dietary advice.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/strik?utm_term=what+does+jesus+say+about+eating+food PDF link annotation
    • http://tatabumilik.iblogger.org/chinese_pinyin_alphabet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416504/normal_601f39f7b1949.pdfIn PDF document text
    • http://xukekutotipepet.iblogger.org/bissell_spot_clean_pro_pet_cleaner.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413231/normal_605b17559650f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472488/normal_5ff40a588f571.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b4e79a3f-0083-4b26-8056-4fe87fb46dfd.filesusr.com/ugd/332c1b_7f49d130ee2748d3860c5380964bb746.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4589459c-10fc-496d-85e1-69a33c00bae2/what_does_refuse_to_believe_mean_in_greek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de2be671-cf24-4bbe-8e3b-b7635983e176/what_are_the_types_of_hydraulic_fittings.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/xovasebuzoganaweledakozo.pdfIn PDF document text
    • https://2ed821ec-8078-4e74-b11b-c5cec6a88262.filesusr.com/ugd/65e777_71ca40fb3a7642ce836d8ba8d69442ac.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd63ccc7-5bc0-4e3e-b87f-b4cd816c0ac0/89321912870.pdfIn PDF document text
    • https://1a2149e7-ca7f-4e7c-a584-0e483de6f3af.filesusr.com/ugd/9219f8_740a87741f2a4a48bb5a13859946e9a0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/the_carbon_cycle_transparency_worksheet_answers.pdfIn PDF document text
    • https://c0e8410b-c394-4b36-8083-179878a46647.filesusr.com/ugd/d4b1dc_8ffaf582f13744758391566c32de80a8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jugobimuraje/cambria_math_font.pdfIn PDF document text
    • http://mokodipixa.epizy.com/rewuvekowel.pdfIn PDF document text
    • https://2f2ab42d-e0b4-4bd3-aa50-2430da1ff5fc.filesusr.com/ugd/eaf48f_1caeb9f289b64c52a56854ba2a7758a5.pdf?index=trueIn PDF document text
    • https://78151a86-a557-4e49-81aa-a2539eea45c7.filesusr.com/ugd/204f4f_8cdb77094c7b440dbaa7957eab34437f.pdf?index=trueIn PDF document text
    • https://3491c55f-27e3-40bb-839b-e55f5d2a6f06.filesusr.com/ugd/d14465_fb9bd02a93ea42349055dac417b2aa43.pdf?index=trueIn PDF document text
    • https://571cbd0a-ba82-408d-be6d-2df53a8fcfe5.filesusr.com/ugd/02af14_b3acb2ce46024b68a69d9c2cdfe87d8a.pdf?index=trueIn PDF document text
    • https://9abff256-b119-4e75-a612-dfc075f5428e.filesusr.com/ugd/c73517_8a07a1fd54094fd9ae71392e5fc94006.pdf?index=trueIn 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_off0000e059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE059 5372 bytes
SHA-256: 2207a894c2c9273a7bf620217f39105ebad3228c36dd9690fc18c30d928a1624
font_01_sfnt_off0000f2be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BE 11084 bytes
SHA-256: a8ec0314e3aa4909a80d7c1483ef92b6ce932c14756104d7804781977a6e826d