Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b3d0ad482a951d7…

MALICIOUS

PDF

74.2 KB Created: 2021-02-28 20:15:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a26db65e1bce2d4a90896c894699624f SHA-1: 9b836a22daf98c5e27a75c8a2b819547f5f0b83f SHA-256: 8b3d0ad482a951d7bf38f6e13199eda56d3b6701aa977998911c12a4789ed062
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://soxebez.ru/123?utm_term=rca+systemlink+3+codes+for+tv PDF link annotation
    • https://cdn.sqhk.co/kasuwajavi/ijjjhxk/radiant_cut_diamond_thin_band.pdfIn PDF document text
    • http://kusafomidufe.mywebcommunity.org/dijajajejiridivexoga.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464724/normal_5ffae82cbc27d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413563/normal_5fdbdd7c339b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403557/normal_60386a4f3921e.pdfIn PDF document text
    • https://cdn.sqhk.co/zirimikuj/VlejjCQ/five_nights_at_freddy_s_ar_special_delivery.pdfIn PDF document text
    • http://lupelisizi.medianewsonline.com/what_is_not_an_outcome_of_contract_negotiations.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459479/normal_6028b956e865a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421966/normal_6030443314565.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366343/normal_5fd61d1eeaf97.pdfIn PDF document text
    • https://cdn.sqhk.co/gosukutusu/igjchen/lareveru.pdfIn PDF document text
    • http://tepugorotewole.medianewsonline.com/82752057133.pdfIn PDF document text
    • http://mesugowogidevik.iblogger.org/avast_ad_blocker_for_chrome_free.pdfIn PDF document text
    • https://cdn.sqhk.co/nufuwijili/iKCSFo2/99614462619.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/makumapikeze/user_manual_for_samsung_a10_mobile_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/nojemi/46944953159.pdfIn PDF document text
    • http://lobobojisuwifip.epizy.com/ps4_platform_games_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/gta_v_assassination_stock_market_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/breakup_shayari_images.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_off0000d7dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DD 5352 bytes
SHA-256: 19a7698c81256ee057c36ca26c4a7f28e52131603bb922a84a6d07f6506452b5
font_01_sfnt_off0000ea05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA05 10692 bytes
SHA-256: 4c1594d87aafcd4d54620b6b08ce73d2012164d463ecb940f8c11a5e58b75374
font_02_sfnt_off00010dea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DEA 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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