Malicious PDF — malware analysis report

Static analysis result for SHA-256 08c1e480a36381d6…

MALICIOUS

PDF

86.5 KB Created: 2021-03-27 10:33:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 71c60b9ad54c5406a613070460c6e513 SHA-1: 685f7b48ddf2e8de967be4530a9fe82f5d795aed SHA-256: 08c1e480a36381d665fe2998b9c70c752729637dd3157f51c1798ff51adc69ae
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a phishing or malware distribution campaign, likely leveraging embedded JavaScript for obfuscation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/wix?keyword=blade+200+sr+x+manual PDF link annotation
    • https://tadonajates.weebly.com/uploads/1/3/4/3/134319020/basowexofaxirabiguto.pdfIn PDF document text
    • https://guginolorenoba.weebly.com/uploads/1/3/4/7/134722040/8373229.pdfIn PDF document text
    • https://cdn.sqhk.co/sogefuluf/njdEhI9/66183206066.pdfIn PDF document text
    • https://mogisitubetaw.weebly.com/uploads/1/3/4/4/134496388/futekatamito.pdfIn PDF document text
    • https://wixifaxofosa.weebly.com/uploads/1/3/1/3/131398582/parowi.pdfIn PDF document text
    • https://cdn.sqhk.co/zaviresodew/gdwjgjf/among_us_minecraft_skin_skindex.pdfIn PDF document text
    • https://cdn.sqhk.co/leruwexikud/ibjeTia/gumball_games_school_house_rush.pdfIn PDF document text
    • https://cdn.sqhk.co/tofigidukug/DhaqjiV/anorectal_and_colon_diseases.pdfIn PDF document text
    • https://cdn.sqhk.co/jagibuvat/xjjheQo/41446753421.pdfIn PDF document text
    • https://cdn.sqhk.co/pewesopefim/id81mhb/pupefumikotona.pdfIn PDF document text
    • https://cdn.sqhk.co/ragejeli/jgjjeek/pudam.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisidumes/BiQjghe/thoracic_outlet_syndrome_symptoms.pdfIn PDF document text
    • https://cdn.sqhk.co/sogefuluf/aUgj7jB/toronto_cycling_app.pdfIn PDF document text
    • https://cdn.sqhk.co/tefozakozup/gg5mUjj/pametukujifonezujunilereg.pdfIn PDF document text
    • https://vadalafazewa.weebly.com/uploads/1/3/4/8/134897988/2480949.pdfIn PDF document text
    • https://cdn.sqhk.co/ponesigis/cuicN4I/my_melody_wiki_fandom.pdfIn PDF document text
    • https://cdn.sqhk.co/tevosenijosu/eBBkijp/12664258306.pdfIn PDF document text
    • http://ruvinowuge.scienceontheweb.net/14441059593.pdfIn PDF document text
    • https://cdn.sqhk.co/zonakagud/g3hcigh/zunusobojujilugiwa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://namakanexir.atwebpages.com/gaxokolobojabaza.pdfIn PDF document text
    • http://romepasuv.myartsonline.com/75357490226.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBE 5360 bytes
SHA-256: 75d7ae146376f0e53614a91a303eb6b0be642ca30db76e3122499bc3b5ed2828
font_01_sfnt_off00010ee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE7 11576 bytes
SHA-256: 05e786abbea6314365d99cf9cc4dfdfa7ca425b3db496dc8cb2c2e752946760b
font_02_sfnt_off00013642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13642 16084 bytes
SHA-256: b778697e4b6ce0ccae7911b6423184e4633bd3eccf4460cac772c98ad637a855