Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bc538f8b58c6607…

MALICIOUS

PDF

79.0 KB Created: 2021-03-14 14:10:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 51b42770db893b8199bfc1bf3fe7a6fd SHA-1: 71cb5d6c0317e36a512cd855315c55ea21d1130a SHA-256: 6bc538f8b58c66076632be9780caac1792fb6304ce7609a34db9917443c87458
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 0.9992

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://vilenefex.ru/award?keyword=allelopathy+thesis+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386593/normal_6009bbb80ee07.pdfIn PDF document text
    • http://ottics.ru/rojatakosonozorebimomegfrkjq.pdfIn PDF document text
    • http://puvepum.getenjoyment.net/botorujet.pdfIn PDF document text
    • http://ita-talia.fun/5591908310659jeh.pdfIn PDF document text
    • http://dehydratedoriginalgoodness.com/kavi_bana_jathaka_kathaxduoo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409814/normal_602aa26ec03da.pdfIn PDF document text
    • http://gidujoluj.mypressonline.com/because_of_miss_bridgerton_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476564/normal_600fc8695eecf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405642/normal_5fdd2828d9eed.pdfIn PDF document text
    • http://winoorama.space/11919418477jmvvc.pdfIn PDF document text
    • http://criticcxck.space/aaon_stock_report7785e.pdfIn PDF document text
    • http://huseyincanx.com/12171816735znxcn.pdfIn PDF document text
    • http://goodxday.xyz/7516604653404y0q.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wadekazu.epizy.com/7_aspects_of_culture.pdfIn PDF document text
    • http://sefazofogizi.epizy.com/tone_it_up_arm_and_ab_workout.pdfIn PDF document text
    • http://zopiselewanut.epizy.com/nts_book_for_bank_test.pdfIn PDF document text
    • http://lugenofakikale.rf.gd/planet_fitness_exercise_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b55a6ef-c71b-4278-939a-9784f5cf1023/41169915967.pdfIn PDF document text
    • http://bavufupuvamopaf.atwebpages.com/livro_paraiso_perdido_john_milton.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1645e7e3-4d27-4091-992b-a25de0c88dfa/whirlpool_quiet_partner_1_heating_element.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ad9a155-54b1-49fe-b6c6-cbf0f8f4842d/18276220664.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07b818ff-5295-40cd-8bd9-fb0adcfd28d9/how_to_change_a_honda_lawn_mower_blade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/483cad7b-492d-4b68-a351-ab75c5f2b9c5/85132769073.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_off0000f812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF812 5124 bytes
SHA-256: ab0c617617485930c7b491190eebfbb073e245bde94ccb62744437fbec2160c0
font_01_sfnt_off0001098e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1098E 10808 bytes
SHA-256: 33644bec0b60619529c5b95f87327ee435b59187886021cbc5523a33038c5308

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