Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac5c37c0fdafe833…

MALICIOUS

PDF

80.8 KB Created: 2021-03-20 07:15:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ddc7d2b4be4ffd411178aceb7d610fd8 SHA-1: 2cd897da3e35b18c33be222fa80311234366864f SHA-256: ac5c37c0fdafe833c2c8c4371982a7dc18bc5e3290d31b7accdbe6ab287633d9
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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/wix?keyword=zombie+truck+games PDF link annotation
    • https://cdn.sqhk.co/pogadidotilu/Flgjjgh/princess_leg_spa_royal_beauty_salon_irving_tx.pdfIn PDF document text
    • http://kefijor.mygamesonline.org/how_to_make_a_platformer_on_scratch_griffpatch.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465548/normal_5fc5ea15779e9.pdfIn PDF document text
    • http://xxlmature.site/dodge_caliber_dash_lights_flickeringuofqg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403685/normal_6050611263700.pdfIn PDF document text
    • https://cdn.sqhk.co/suxujaba/hggf6je/smashed_potatoes_with_parmesan_cheese.pdfIn PDF document text
    • http://gokojun.scienceontheweb.net/oxford_picture_dictionary_second_edition_free.pdfIn PDF document text
    • https://cdn.sqhk.co/zasemewiti/MMMx3hb/15864215781.pdfIn PDF document text
    • http://interbankdigital.com/imagenes_de_cerebros_para_colorearplxec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409425/normal_600c351e4f094.pdfIn PDF document text
    • http://ericksandoval.com/faxopijozofbkasy.pdfIn PDF document text
    • http://sayseedokg.com/26901076738el6hi.pdfIn PDF document text
    • https://cdn.sqhk.co/bivadudit/XvTqWgc/wordmaster_app_review.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
    • https://s3.amazonaws.com/dixaleko/22334644649.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/49725109603.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/381700c1-d3e8-47f4-adfe-d3b64b2ed46b/7952650092.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/10811080158.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dd42a27-682c-4fec-b237-b0f637b57aa1/91434525641.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/sentencing_guidelines_for_manslaughter_in_florida.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B5 5024 bytes
SHA-256: b26b8d2ba76a26c64cb057701d2e9911d14cff505169c82cacf1816d88dfc0dc
font_01_sfnt_off000103df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DF 10424 bytes
SHA-256: c97c3b75c932eb5e29906cc86c96bb30b7ac0c6890f6bd3042ac7cda068e23b6
font_02_sfnt_off00012798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12798 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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