Malicious PDF — malware analysis report

Static analysis result for SHA-256 34a28885995b99e8…

MALICIOUS

PDF

78.8 KB Created: 2021-03-29 03:02:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f9c0d7fdd1effe6b988b3866968f6232 SHA-1: 1c499a71773687b913e15d6666391c44b87d2203 SHA-256: 34a28885995b99e8dca8754704d730aeaa1934f7b3956e15d37db35c5cab5395
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 0.9964

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://vilenefex.ru/strik?utm_term=army+brigade+opord+example PDF link annotation
    • https://kominalekawer.weebly.com/uploads/1/3/1/6/131636772/tedemojutizodokilo.pdfIn PDF document text
    • http://dabatimogumerek.iblogger.org/mild_form_of_pectus_carinatum.pdfIn PDF document text
    • https://wavenugila.weebly.com/uploads/1/3/4/8/134852162/vaniwi-ferojotakep-bonedutizowate.pdfIn PDF document text
    • http://katagonubazi.22web.org/fusajiwozupatabexuki.pdfIn PDF document text
    • https://cdn.sqhk.co/fefowofuk/jjnhgif/fuvoka.pdfIn PDF document text
    • http://lnstagramcopyrightservices.org/bedanobojururowissqwe9.pdfIn PDF document text
    • http://gesajobode.22web.org/my_friend_dahmer_film_trailer.pdfIn PDF document text
    • http://gikonifip.22web.org/classic_human_anatomy_winslow.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/cjeibhd/95768262004.pdfIn PDF document text
    • https://jegupifak.weebly.com/uploads/1/3/4/0/134018348/14e2070e269785.pdfIn PDF document text
    • http://favanitum.iblogger.org/biwojiwaxifo.pdfIn PDF document text
    • https://cdn.sqhk.co/baxoladipezu/Hibicjf/cod_fish_recipes_baked_healthy.pdfIn PDF document text
    • http://milky-rp.space/90469288982nwdvh.pdfIn PDF document text
    • https://cdn.sqhk.co/rusobotakox/jfEHYDI/prepper_food_list.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/idOKvZT/nasa_spacex_rocket_launch_video.pdfIn PDF document text
    • http://mamontov-net.cc/39064278984nqoab.pdfIn PDF document text
    • https://kedaregedowe.weebly.com/uploads/1/3/5/3/135321867/kuxexu_sisar_xusagag_temami.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/59f16e81-c937-4afc-bf90-7efc6d3449b3/57199775657.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a6e5b28-ee6d-4ced-b958-9471cbf6126c/corbett_maths_tree_diagrams_worksheet_answers.pdfIn PDF document text
    • http://lunupesefobe.rf.gd/96807763926.pdfIn PDF document text
    • http://gokatajikimole.rf.gd/7-1_skills_practice_polynomial_functions.pdfIn PDF document text
    • http://fopekexu.epizy.com/linux_app_service_plan_arm_template.pdfIn PDF document text
    • http://renaxodemebi.rf.gd/wozukepixuleme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/980c6eed-bc41-425f-9b69-d6e01aa48a3d/what_are_some_good_exercises_for_neck_pain.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ce5e327-c95a-49df-9a3d-451272d0fcc8/jizisuregizif.pdfIn PDF document text
    • http://zezogif.rf.gd/printable_guitar_tab_sheet_music.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_off0000f74e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74E 5400 bytes
SHA-256: ad3f5dbbb720835a7633a06a39c187d0e6fed8a46056049ea15fbbe7dd7ad46c
font_01_sfnt_off000109a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A0 10572 bytes
SHA-256: 0a833aeda9aa74243797adb302c9ae6f0990e324069f952e837ef4c432292c53

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