Malicious PDF — malware analysis report

Static analysis result for SHA-256 9600fa356d9ebbd3…

MALICIOUS

PDF

79.4 KB Created: 2021-03-23 04:50:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f5a3de84c39aa159d55315773e4243ab SHA-1: 100b6efa8726cb1007d3fb988a54aad91ce3e04b SHA-256: 9600fa356d9ebbd3c272f869893580c3cbf695f91a9d0e84d91626af3be2d1e3
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://ponafet.ru/123?utm_term=business+offer+letter+format+in+word PDF link annotation
    • http://losopefopamusoz.sportsontheweb.net/linfoma_no_hodgkin_burkitt.pdfIn PDF document text
    • http://tixokapine.mypressonline.com/le_petit_nicolas_cast.pdfIn PDF document text
    • http://mutujejeturuduf.medianewsonline.com/how_to_cancel_enercare_hot_water_tank_rental.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/bb439bb4-b781-4d28-aa63-1a568850f1e5/91737987559.pdfIn PDF document text
    • https://c504e2ef-f928-4e80-b5b1-fc05046f432e.filesusr.com/ugd/247f25_0c138a3d15144cdead9120a475bf67cf.pdf?index=trueIn PDF document text
    • https://06e27459-8a58-4d01-a48e-f853eab966f6.filesusr.com/ugd/55f1a0_c919197b723743648aa37afe2c9a15d0.pdf?index=trueIn PDF document text
    • http://rodexiguv.onlinewebshop.net/advantages_of_computer_graphics.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/what_ice_cream_doesnt_have_carrageenan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ec487f7-c048-4beb-b9ee-877655316de9/what_are_the_strengths_and_weaknesses_of_cross_sectional_study.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1409562-1bb0-49c4-a2b6-dbd5cd0f9f5d/demumesuvuwinokenufet.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/rirerunugamewe.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/learn_portuguese_now.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d911caf-d2ba-4ab0-be11-191931c6ff0d/tufebewetipupukeke.pdfIn PDF document text
    • https://9cf5cc10-3c2e-4e30-ae6b-73ed7beed88a.filesusr.com/ugd/5c2b46_b28936198172485197ab068ea0317fcd.pdf?index=trueIn PDF document text
    • https://6bc553e5-d0de-4278-827a-c77c8eb32fbd.filesusr.com/ugd/4a6c57_fc919ed1a8cd420c9012c2f1c5f47bea.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kosamupim/extra_long_twin_platform_bed_with_drawers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11421e76-944f-447d-9d6c-0a6278287f11/basic_math_worksheets_for_kindergarten.pdfIn PDF document text
    • https://6131fb9f-3080-406c-a6ab-c4686b6a2f6f.filesusr.com/ugd/52be6f_ac172f5b4d3c4b0f80f82e14839af3fa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sabegokek/fortinet_firewall_200d_configuration_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91bf4323-be54-4f90-b08b-74b1ee74bfab/coleman_powermate_3250_generator_parts.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_off0000fa0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0C 5196 bytes
SHA-256: c83e26bd00972f5ab95fccadd68122ca7bad7ad661ae210733f73d7291b7e653
font_01_sfnt_off00010bb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB0 10616 bytes
SHA-256: 17d73cba1fc1692a45259c9b567714c7de1fe110b77d2656806b2f5ee3b6b95a

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