Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c1232b9e036b1f1…

MALICIOUS

PDF

85.6 KB Created: 2021-03-18 23:50:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6512251bc9130c9f2c7c653d8682b7ad SHA-1: 219c0010d930c2c67044aa60b07afbb90e8f351e SHA-256: 4c1232b9e036b1f12388a2d19d6ef88b2c87da599b7f69940c2756302315c211
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 0.9997

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://nipisod.ru/strik?utm_term=how+big+is+whirlpool+duet+washer PDF link annotation
    • http://topstop.site/crowded_house_band_2020yqyiy.pdfIn PDF document text
    • https://cdn.sqhk.co/nixafusoda/iozhjVk/stick_warrior_super_dragon_shadow_fight_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/goponebegor/uCVdRig/folk_songs_dj.pdfIn PDF document text
    • https://remogomati.weebly.com/uploads/1/3/4/7/134748537/gonevukaxap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445119/normal_601e020657a6a.pdfIn PDF document text
    • https://fekakawe.weebly.com/uploads/1/3/1/4/131437222/fosaxef-lazodelosodak-gijijofekepiv.pdfIn PDF document text
    • http://subonus.ru/excel_formulas_cheat_sheet_video9qan9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467325/normal_6006ba599933a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447916/normal_5fe0629d52e94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366008/normal_5fe7a1d80ff7f.pdfIn PDF document text
    • http://rabota-plus.club/86103025873e3xi7.pdfIn PDF document text
    • https://cdn.sqhk.co/liwewajawab/igiXhbZ/junior_achievement_stock_market_challenge_miami.pdfIn PDF document text
    • http://trynon.xyz/what_is_the_significance_of_moon_and_star_in_islamg2orm.pdfIn PDF document text
    • https://bovatukal.weebly.com/uploads/1/3/0/7/130739183/dalitepekamuge.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kidiwafupilisu.rf.gd/27914962220.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eeba6586-8e6f-4ab8-b0e4-57fb551e7b2b/momoxaja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77157417-9812-4b19-baa0-0d90472e717a/vizio_sound_bar_wireless_subwoofer_how_to_connect.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cb630ec-6fd1-4ffc-9faf-573fd8a14ebc/92162988820.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c9e16da-eb6e-40a1-8ad7-bff1d32b313e/56772764340.pdfIn PDF document text
    • http://ragoziminazu.epizy.com/chess_queen_s_gambit.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11065 5416 bytes
SHA-256: 05a92bc48763a6512777e5d3e855e9a01aef86b998f6135e154551daf315ca4c
font_01_sfnt_off000122d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122D0 11208 bytes
SHA-256: 7d30173146ab10944f3137f6301b751a5282ad0f81748abb4361778b2b357ce8

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