Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e51810b1f200004…

MALICIOUS

PDF

79.3 KB Created: 2021-03-06 12:40:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e6fadd5be97b3e4f85426e641977c5f SHA-1: e2fa2b38910740abaa52968f6ed64ecfa1500ccf SHA-256: 0e51810b1f200004173f16e8d2885b3760aab7e3604053eab219a8de6a7b778a
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used in SEO link farms to manipulate search engine rankings or to direct users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or a scam. Although no scripts were explicitly extracted, the PDF structure and the presence of many external links suggest it's designed to redirect users to potentially harmful content.

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://pelibifir.ru/123?utm_term=how+to+play+rainbow+with+mouse+and+keyboard+on+ps4
    • https://xezudabumaku.weebly.com/uploads/1/3/4/3/134377243/6a1d4d6d6131.pdf
    • https://wokiliga.weebly.com/uploads/1/3/0/8/130814475/wovipalejinegi-litunot-xasegul-gajumakefuxur.pdf
    • https://xegadoponuxi.weebly.com/uploads/1/3/0/7/130775279/jimud.pdf
    • https://cdn.sqhk.co/bamosabubesi/ehixih8/lerirotikatutibonugakif.pdf
    • https://zewalomoweso.weebly.com/uploads/1/3/4/5/134588134/ropotujol_siloraxodeju_xarazumus.pdf
    • http://psylath.com/272667716608y216.pdf
    • https://cdn.sqhk.co/zimopaji/eEhafkU/subway_surfers_princess_runner_apk_mod.pdf
    • https://cdn.sqhk.co/tajiwikiter/LjhjbB0/car_x_drift_racing_mod_apk_hack_download.pdf
    • https://cdn.sqhk.co/vujixete/gickhjH/how_to_iron_clothes_with_a_straightener.pdf
    • http://wordwild-store.com/895488282318ll1g.pdf
    • http://cashbackk.site/80917537194g7yrg.pdf
    • https://cdn.sqhk.co/lubometusoz/lfgjEii/takeout_restaurants_open_late_in_memphis.pdf
    • http://introdom.ru/online_todo_list_app_freeuw097.pdf
    • http://hot-money.fun/rhetorical_grammar_8th_edition_answer_key5vmar.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://03ca3561-abfe-48ca-9b59-b1b2b77f8126.filesusr.com/ugd/1af49e_e2e39d01f7ce4be49b7fb71f7a65197d.pdf?index=true
    • https://s3.amazonaws.com/kosamupim/sedimentary_rock_worksheet_middle_school.pdf
    • https://s3.amazonaws.com/wegugus/pittsburgh_steelers_injury_report_2019.pdf
    • https://s3.amazonaws.com/jezobasit/sovijimekileda.pdf
    • https://s3.amazonaws.com/kujapomib/hec_attestation_authority_letter_format.pdf
    • https://ba789de2-c385-43ee-b32d-a34c698d1993.filesusr.com/ugd/b7082a_f94ebdf78df8487385666f95ccc8f0d1.pdf?index=true
    • https://61090d85-22e6-4724-b969-52a17785150c.filesusr.com/ugd/952c2e_31c530858df747718c5422d38071b353.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_off0000f53f.bin
e87c1fb418d8a2032519d31222c1953468545c42ece7221686b134fccecd8849		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF53F 5644 bytes
font_01_sfnt_off00010857.bin
3455471ae7cf1b525eb551cda690a2759a63cbfb65fcc43577339f9ec2263c58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10857 11968 bytes

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