Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9d717368e482fa7…

MALICIOUS

PDF

136.5 KB Created: 2021-02-25 03:51:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 5217afc664ac33f3127d51d45397052a SHA-1: bb6cb2d7b63c352c1431fda91dd1a162fac86cfd SHA-256: e9d717368e482fa7b62bb623a02ce04937e92a1a8864117526afe38fc1f1b0d7
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, appears to be a lure related to search queries, directing users to external sites like https://jottigo.ru/award?keyword=how+do+you+calculate+poisson+distribution. This suggests a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/award?keyword=how+do+you+calculate+poisson+distribution PDF link annotation
    • http://salonvarna.com/hp_6700_error_code_0x61011bedqjr49.pdfIn PDF document text
    • http://mavigawika.scienceontheweb.net/givigefum.pdfIn PDF document text
    • https://zorisurirumu.weebly.com/uploads/1/3/4/6/134600588/90f722005bf1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408004/normal_602ed9add475c.pdfIn PDF document text
    • https://kedabivaj.weebly.com/uploads/1/3/1/4/131438143/tajonowa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420018/normal_5fc74ecc429a7.pdfIn PDF document text
    • https://kigilejujagenit.weebly.com/uploads/1/3/1/4/131438309/rulari_tabajazupule.pdfIn PDF document text
    • https://cdn.sqhk.co/wosepimi/fgdgh3h/arcade1up_golden_tee_mod.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/tabela_percentual_de_gordura.pdfIn PDF document text
    • https://fazerirusabutef.weebly.com/uploads/1/3/1/3/131381144/logevoba.pdfIn PDF document text
    • https://cdn.sqhk.co/wanevakaxuma/rhbjiic/jopuwumobafelize.pdfIn PDF document text
    • https://cdn.sqhk.co/xituvusaw/idgijcr/55116699414.pdfIn PDF document text
    • http://pofuxubilet.sportsontheweb.net/kunufudexemi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477615/normal_6032dcd0ed766.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427093/normal_5ff1c5f72ca27.pdfIn PDF document text
    • https://rinavotonig.weebly.com/uploads/1/3/4/4/134477757/cbadc418a.pdfIn PDF document text
    • https://cdn.sqhk.co/zovitamojim/gcTnjiW/city_mania_town_building_game_pc_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://pojozija.onlinewebshop.net/is_it_legal_to_marry_two_wives_in_australia.pdfIn PDF document text
    • http://vilepobafomunow.atwebpages.com/samsung_grand_prime_pro_battery.pdfIn PDF document text
    • http://zevusup.atwebpages.com/ditog.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019ed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19ED4 5244 bytes
SHA-256: 34481286805c3b58ab2ed4aba2e10ed28ecc73b178adca0c2652c5d42f7787d7
font_01_sfnt_off0001b0bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B0BB 19384 bytes
SHA-256: 5140aae54184b2397a0e7013a7937b08bfdbe2a3a3956e5916db056915ce0a18
font_02_sfnt_off0001eddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EDDD 16716 bytes
SHA-256: 25a47b9d80e5cf7ab5126dd37d315c880db37769f356f5f82fb15484ff898529
font_03_sfnt_off0002054b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2054B 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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