Malicious PDF — malware analysis report

Static analysis result for SHA-256 06a0494465eaf6ba…

MALICIOUS

PDF

85.6 KB Created: 2021-03-14 22:48:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c50b58ca3e300c6d98ded8e715e6dce3 SHA-1: f0a4646fdab84ba2032c6abbb0fddcba6327e1d0 SHA-256: 06a0494465eaf6ba60f6fb5a98fd58d4a59c422938fdcfba3e8aecfc7fecf175
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains fragments suggesting it's a lure, possibly related to news or sports, to drive users to these malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=washington+post+sports+reporters In PDF document text
    • http://juvovagesubo.mywebcommunity.org/pigafizafum.pdfIn PDF document text
    • http://tijudozi.scienceontheweb.net/the_bluest_eye_quotes_with_page_numbers.pdfIn PDF document text
    • http://upsbox.ru/gudupusaztoq2t.pdfIn PDF document text
    • https://cdn.sqhk.co/duwokarewesu/oJhgbja/best_carrot_cake_cupcakes_near_me.pdfIn PDF document text
    • http://testrun.ru/what_car_seats_are_compatible_with_city_mini_gt2ra9t7.pdfIn PDF document text
    • http://uptodate.site/7849753815f50l.pdfIn PDF document text
    • http://micrometerdigital.xyz/fathers_and_sons_movie_2005zihpl.pdfIn PDF document text
    • https://cdn.sqhk.co/pufuxarabo/djcFrUr/33947896751.pdfIn PDF document text
    • https://cdn.sqhk.co/burajugi/havebnx/final_fantasy_iv_psp_cheats.pdfIn PDF document text
    • https://cdn.sqhk.co/ribovonubod/cjaP1if/vutusibebubur.pdfIn PDF document text
    • https://cdn.sqhk.co/nuroteditu/vVjc3jf/32865394828.pdfIn PDF document text
    • http://nomenowunesazoz.scienceontheweb.net/how_to_do_a_toe_touch_cheer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xovipofeguz.epizy.com/11200374090.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a927743e-d75d-4e68-826c-2479967a0537/piseruguzipopiwewetixa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49047292-7080-45e5-9b45-a4a96f203e2a/sosasidoxesupunovekujaj.pdfIn PDF document text
    • http://mavavopem.rf.gd/chemotherapy_in_pill_form_for_breast_cancer.pdfIn PDF document text
    • http://kixixiwibatogit.epizy.com/48967045339.pdfIn PDF document text
    • http://wedejilifolani.rf.gd/94785432468.pdfIn PDF document text
    • https://592908bf-dd96-48cc-88d9-ffebbdd10d84.filesusr.com/ugd/f34823_7afbc50c1be040d893c1eaecadcf82cf.pdf?index=trueIn PDF document text
    • http://zanofifaluli.epizy.com/price_of_htc_m8_in_nigeria.pdfIn PDF document text
    • https://ee897e78-a157-4eb5-8a47-d615096087a2.filesusr.com/ugd/113e89_8acec7b4e3694df7a77fc5b77d7284cc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fc55a23-2e2b-47b9-ae44-3a3a7783ed87/55831102510.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA4 5064 bytes
SHA-256: 27a00b2496109542607469ffb323118abedd08e08f2b4b9ea1c4deef9f0ba237
font_01_sfnt_off00011fe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE7 11664 bytes
SHA-256: bfcf6113a78b1fd7e89dea018555eab57d0b60ca2cd9ec58fc421758da881e0f

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