Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d79a553d64f013f…

MALICIOUS

PDF

70.8 KB Created: 2021-06-10 22:29:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 318e6ed63686d362e692bd539af34c14 SHA-1: ca06ef2e7b18b4c368a060e70076870798c69492 SHA-256: 6d79a553d64f013fb4f76369bcde80658359c1fa8bc73786241cd1ede00c8271
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://crewmak.ru/pbw?utm_term=dingiri+dingale+meenatchi+tamil+song+lyrics PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465924/normal_6042e0ac243a4.pdfIn PDF document text
    • https://megefutuw.weebly.com/uploads/1/3/0/9/130969536/bisavumine_valive.pdfIn PDF document text
    • https://gadudomarun.weebly.com/uploads/1/3/4/7/134705140/kuzofix-zovuworirewut-povuzanududam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382643/normal_5ffbb6a2f15e5.pdfIn PDF document text
    • https://nugekepujipa.weebly.com/uploads/1/3/4/3/134318644/kujenawalap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386609/normal_6054e1156186e.pdfIn PDF document text
    • https://lulaxakopoto.weebly.com/uploads/1/3/4/3/134331182/juruk-wujirowenageji-dafojekazinem-basej.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402478/normal_5fccf201d94e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410030/normal_60107b05b57b9.pdfIn PDF document text
    • https://pixokunotozonux.weebly.com/uploads/1/3/4/0/134017876/e2c3de51284b01e.pdfIn PDF document text
    • https://dudererojafa.weebly.com/uploads/1/3/4/3/134362298/ab37205a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sajutom.pbworks.com/w/file/fetch/144705636/13846743384.pdfIn PDF document text
    • http://gitixofipoxu.pbworks.com/f/samsung_tv_firmware_update_1242.pdfIn PDF document text
    • http://jebodigezev.pbworks.com/w/file/fetch/144783804/15099675322.pdfIn PDF document text
    • http://lomexalipele.pbworks.com/f/toy_story_3_game_download_for_ppsspp.pdfIn PDF document text
    • http://ririgifavem.pbworks.com/w/file/fetch/145030332/when_will_miraculous_season_4_be_out.pdfIn PDF document text
    • http://fixiguru.pbworks.com/f/ragnarok_m_eternal_love_leveling_guide.pdfIn PDF document text
    • http://wikitaxif.pbworks.com/w/file/fetch/144677652/guvedodedubakiwopav.pdfIn PDF document text
    • http://gufabewa.pbworks.com/w/file/fetch/144456906/blackweb_wireless_charger_user_manual.pdfIn PDF document text
    • http://sulegiwi.pbworks.com/w/file/fetch/144621792/47355243512.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_off0000d6ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6FF 5456 bytes
SHA-256: a07620699ef4c491edfc511fd8b416b0d02f9cebc8d03dff13f1cd4840759eeb
font_01_sfnt_off0000e971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE971 10540 bytes
SHA-256: aed8a22c13fd74431d89ed8d12e44fd9a7eeceb7ef2ca50961bbeedb6a8e839a

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