Malicious PDF — malware analysis report

Static analysis result for SHA-256 b71bd8190dc6b6ae…

MALICIOUS

PDF

107.3 KB Created: 2020-11-14 04:12:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: c702a849856ed4f7deba4c605f9d8abb SHA-1: 906f3da61ff14c765fb2d5a2e6b2f905bd97dfcf SHA-256: b71bd8190dc6b6aed2876826206a562a166721d6e7730290e3e71b01e213cbab
216 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses brand-impersonation credential phishing. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://fogakorix.weebly.com/uploads/1/3/3/9/133997140/xositonunaz_moxokowowilejep_tusanitaw_sonuz.pdf.
  • 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://trafffe.ru/aws?utm_term=access+to+information+programme+foundation PDF link annotation
    • https://fogakorix.weebly.com/uploads/1/3/3/9/133997140/xositonunaz_moxokowowilejep_tusanitaw_sonuz.pdfIn PDF document text
    • https://xivenisulebitok.weebly.com/uploads/1/3/1/3/131378814/02779f3c.pdfIn PDF document text
    • https://dopikilazobowu.weebly.com/uploads/1/3/4/4/134488506/d55d4.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/571fc6b7-d0e9-424b-9033-4ba41fcf04d4/24567047316.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1e75b03-62b4-4acb-b3c9-f580408e4b01/jozumulafer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78604b55-a5bd-4ba2-9d2e-b08add85b6a2/114_darby_transportation_center.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8336d6a-5fce-495c-b597-45ce9b50638c/xagaforanepameli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/422bb503-3283-47d3-b947-dd3ead2b3b2d/noktalama_iaretleri_ygs_km_sorular.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a188ee85-fbea-410f-a056-5a95ba131b31/nutrition_through_the_life_cycle_7th.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/776a2b84-a495-4769-bbfb-2fe53e884f9a/28898788632.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/foguzosezem.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/play_games_for_free_fnaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c700f58-9e2d-4aa5-9423-09045082dae2/lexasedosigadejefuvatuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ece6702e-b7e6-447a-9046-bae79425f95c/hands-on_machine_learning_with_scikit-learn_and_tensorflow.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000152f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152F3 5432 bytes
SHA-256: 893041aeacd7adf068ed7e76aa7312d59988ad662183b8a94047e8d9a9678c41
font_01_sfnt_off0001655a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1655A 11112 bytes
SHA-256: d0a556f51ae3cc0cd0d0c6de69a97d81348b5a3972758ac4886fcb69398897f3
font_02_sfnt_off00018b76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B76 16028 bytes
SHA-256: 6e14d9a23925fbdd927c7db5f893cbd4d80a19524b1aae448d44ee15d2611241

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