Malicious PDF — malware analysis report

Static analysis result for SHA-256 e149f3f0fe004765…

MALICIOUS

PDF

66.8 KB Created: 2021-03-31 06:39:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 33068038b5876b2453853221463aac4b SHA-1: 97526762badf3c57ea617611d2f9d58d5c3e5407 SHA-256: e149f3f0fe004765f61ac16d343bc76cdd930cf442890f4a7071beb10a961398
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9998

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://fokemale.ru/wix?keyword=geometry+quiz+11.1-11.2+answers PDF link annotation
    • http://femaxewife.getenjoyment.net/android_studio_first_app_tutorial.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wafazitowem.rf.gd/63021992838.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/avery_tent_card_template_small.pdfIn PDF document text
    • http://niwimugosaz.onlinewebshop.net/chemical_pathology_textbook_download.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/xonapa.pdfIn PDF document text
    • http://vekejikusuvi.epizy.com/6162599992.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fc56a30-2045-4963-bee8-766a11b74748/doxewog.pdfIn PDF document text
    • http://datidalumoz.rf.gd/bsc_modern_physics_notes.pdfIn PDF document text
    • http://dufijofitaj.epizy.com/stemi_guidelines_escardio.pdfIn PDF document text
    • http://zizokeb.rf.gd/vavarixinijuvezoselugegak.pdfIn PDF document text
    • http://sebubexegan.rf.gd/definite_and_indefinite_integrals_worksheet.pdfIn PDF document text
    • http://bezegorev.epizy.com/76583563816.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/safuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9906c515-6b2a-4b1e-9630-2002223501ea/18222017875.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/xexupidabod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a06178e5-3c06-444a-a15e-6ebcba1bf0e4/average_salary_in_canada_for_marketing_manager.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10a66f52-d994-4550-ab1a-577dd729b601/the_12_week_year_brian_moran_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38a04fa1-f8b8-466b-9fa6-9830765cd197/p90x_workout_schedule_legs_and_back.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_off0000c6ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6AD 5448 bytes
SHA-256: 21a57e601aa11a797affd9bbe5ffbc24d9c97856e1e02a30c01b54f4eed0433c
font_01_sfnt_off0000d954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD954 10240 bytes
SHA-256: f6ae6fff304ae73756b1168e2bcbc610edc639da14eca43de578446263c93486

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