Malicious PDF — malware analysis report

Static analysis result for SHA-256 89ab4234f92e7b1b…

MALICIOUS

PDF

95.7 KB Created: 2021-03-15 18:02:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 104acc4692b9be58b2e2060545b966e6 SHA-1: dd27b2843623df16a3e355fe9b2eaf4b59476af7 SHA-256: 89ab4234f92e7b1b81b57ff678dd0aaf9c6f850fb10694834ade3aeb60f1caf7
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links pointing to suspicious and known malicious redirector infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, appears to be a lure related to a 'Wotlk warrior arena guide', suggesting a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dafemum.ru/wix?keyword=wotlk+warrior+arena+guide In PDF document text
    • https://cdn.sqhk.co/vuvupewog/3hj5fhg/75939759792.pdfIn PDF document text
    • http://ses-paypal.com/elite_dangerous_engineer_grind_guideui42v.pdfIn PDF document text
    • https://cdn.sqhk.co/salaseli/cRhgOhj/usability_testing_questions_template.pdfIn PDF document text
    • https://cdn.sqhk.co/nurijodefa/gifpUhg/1672450516.pdfIn PDF document text
    • http://podarokinsta.online/how_do_animals_adapt_to_hot_dry_climateshqsox.pdfIn PDF document text
    • http://bodipok.getenjoyment.net/panasonic_kx-tge233b_cordless_phone.pdfIn PDF document text
    • http://paxosij.mygamesonline.org/18573859331.pdfIn PDF document text
    • https://cdn.sqhk.co/bulegumu/yBXnjcn/stupid_zombies_2_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwumixe/xhsjihi/46782134464.pdfIn PDF document text
    • http://nifazafagikoxa.medianewsonline.com/78190464723.pdfIn PDF document text
    • http://mujododaziwato.scienceontheweb.net/80576693891.pdfIn PDF document text
    • http://mawosatejojeka.sportsontheweb.net/putavu.pdfIn PDF document text
    • http://rikafitamedad.medianewsonline.com/41180780780.pdfIn PDF document text
    • https://cdn.sqhk.co/fidapulano/giibxEY/memazuxiwunesedeti.pdfIn PDF document text
    • https://cdn.sqhk.co/woteruzid/gLFajij/flying_dragon_battle_simulator_city_attacks.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a827cc3-1567-4d39-a6a8-088694597c6f/xojewapawowojinoxis.pdfIn PDF document text
    • http://bufijonewufo.onlinewebshop.net/is_drinking_chai_tea_bad_for_you.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f2a13c6-e581-4db5-91b1-55669dc6af05/29357305954.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf379b33-1a5f-44fa-aff9-c6be00596a19/bovojibesedarepoxuparido.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb572484-2d32-4644-8ff8-ee1b543cc5ae/jacobsen_parts_lookup.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_off000137ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137EE 4984 bytes
SHA-256: 149c94c6ee80fc3ec764c81f3ba7b59167733f559f174af282197b38ae284697
font_01_sfnt_off00014907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14907 11336 bytes
SHA-256: 277faeb056925584e4efb6d43f3edb702c2a06b782ea0b479fda095fb1d7bfea

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