Malicious PDF — malware analysis report

Static analysis result for SHA-256 e548e6906af69578…

MALICIOUS

PDF

72.7 KB Created: 2021-03-07 22:09:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 122cc9f8b3955098f53d92c3180ad168 SHA-1: 20201d0c2309eb1a522c543de622e10e1f0ac0e3 SHA-256: e548e6906af69578b91ade98ddd6eb9fe60029899b0d979d10c74a3e4b075d56
156 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. 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 0.9996

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 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.
  • 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://lozipotod.ru/strik?utm_term=power+questions+sobel+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403806/normal_600fb4a79fa06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450337/normal_5fe852c8881e1.pdfIn PDF document text
    • http://jafoxidulez.mypressonline.com/how_to_clean_keurig_coffee_maker_without_vinegar.pdfIn PDF document text
    • http://jopagozopive.medianewsonline.com/37417526823.pdfIn PDF document text
    • http://gewusoluxul.scienceontheweb.net/alone_together_online_escape_room_hints.pdfIn PDF document text
    • https://cdn.sqhk.co/novupezezis/gfuaZQO/descargar_simsimi_premium_apk.pdfIn PDF document text
    • http://mosebuzixat.mywebcommunity.org/can_a_ninja_blender_be_used_as_a_food_processor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427079/normal_6024ef0f04dc1.pdfIn PDF document text
    • https://cdn.sqhk.co/busoleva/ijreJhf/need_for_speed_most_wanted_pc_cheats_software.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487416/normal_5fd995bd49e66.pdfIn PDF document text
    • https://cdn.sqhk.co/kazaluxi/hahi3z5/the_sports_factory_franklin_nc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/70424399114.pdfIn PDF document text
    • http://gekolutewubel.myartsonline.com/99970284566.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/how_to_become_famous_in_bitlife_android.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/zigemimutadegufel.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/lorubogol.pdfIn PDF document text
    • https://2a07c75e-e898-48ba-b326-4cccc82d0599.filesusr.com/ugd/ff154e_33b5a285ca164d59937296123368b26c.pdf?index=trueIn PDF document text
    • https://4993f9ff-345c-4c03-a8ec-d4f8dac664d6.filesusr.com/ugd/debbe1_a984b592d4364f7eaa3a8fefc23746ef.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/agribusiness_management.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/wojoveranuvurimoziwa.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/vuwodowegaromaluxafodo.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_off0000df74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF74 5184 bytes
SHA-256: 33ae7a131286fd4d3907df7f1fbe6a35c80a682f7199e0b5de006859f1487c3a
font_01_sfnt_off0000f133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF133 10552 bytes
SHA-256: 0faca8eebc3ba037afa64cb8087dde6662884e733ee0261af7932e2b552b7187

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