Malicious PDF — malware analysis report

Static analysis result for SHA-256 94c9390e4de3bd55…

MALICIOUS

PDF

78.5 KB Created: 2021-03-14 03:29:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 26892b87ceb13b42f5f0f751a5e68d9a SHA-1: 2c3300eebb87c38f25525d97425c9ec2bb3d127f SHA-256: 94c9390e4de3bd55d2096a88f90e187b571f64fb0e6bc45cdc30b0e91f43db17
186 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URLs, with at least one identified as a potential phishing or malicious redirect. The PDF structure and embedded URLs suggest it's designed to lure users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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 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://druttle.ru/strik?utm_term=the+expanse+cast+season+5+episode+1 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371800/normal_5fe6944b3ff8f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460975/normal_5ff4c455d05ee.pdfIn PDF document text
    • https://tojumemi.weebly.com/uploads/1/3/1/3/131379390/lawapigamubibokese.pdfIn PDF document text
    • https://faruroju.weebly.com/uploads/1/3/5/9/135986438/9708695.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488572/normal_5ff580e741017.pdfIn PDF document text
    • https://mabuvolud.weebly.com/uploads/1/3/1/4/131453706/rabuxewopasodokuri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426073/normal_6033a696092e4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8d684a1e-4078-49cd-b336-05adf09473b6.filesusr.com/ugd/2b25e8_fbd2da78eabb4f76b386122cfddd5cd8.pdf?index=trueIn PDF document text
    • http://nixawoxikoni.epizy.com/wow_classic_tribal_leatherworking_quest_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98ce19d7-c047-4323-921b-5c3184ecd343/sfml_game_development_by_example.pdfIn PDF document text
    • https://fe92b815-f0fe-4223-924b-659339f44b90.filesusr.com/ugd/8f64fc_9b42c418d9d445ce96d6c2e450df61e5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fa000a6-31d5-42c2-bc83-c7e038a3a57f/church_emergency_action_plan_template.pdfIn PDF document text
    • http://lodaxiku.rf.gd/26275257913.pdfIn PDF document text
    • https://1dab3517-3db0-43ff-9fd6-b65b51f65b60.filesusr.com/ugd/565485_8fad6d39e2a94d8abc3d2bd85f645f25.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/98e838e4-9435-4b44-b995-bb31bba193bd/25672512913.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37ea878a-5734-467e-90d2-cf28e8e1d5f2/ramubewabunidotul.pdfIn PDF document text
    • https://592908bf-dd96-48cc-88d9-ffebbdd10d84.filesusr.com/ugd/f34823_bab3e0d6c1044688a1ae4cff265c9269.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f3193bd-1b05-4016-9522-2b0acba8ab22/ms_project_2016_free_download_32_bit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bf12bd5-8b15-49be-98ec-b46c0f591e04/vusumib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eee1d190-fcbc-4f62-8331-96b3e473507e/boards_and_beyond_promo_code_november_2020.pdfIn PDF document text
    • http://perinuve.epizy.com/the_tipping_point_radio_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7928640-3300-461d-abc9-05c5b3d73faf/vebilizofazuro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b247e8f3-149e-4c9a-b47c-afd2f9ef61a7/the_5_love_languages_for_singles_quiz.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_off0000f312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF312 5224 bytes
SHA-256: cbd55f8919086698d45ff5bdad62a19a117b417be1ab4ea36577dbed248c5ca2
font_01_sfnt_off000104e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E5 11172 bytes
SHA-256: 9fc1ee2b30d7f03f11eb37601dbba77812fd4fddfc6d243d52403d55e0188e1d

Open this report in the interactive analyzer, or submit your own file for analysis.