Malicious PDF — malware analysis report

Static analysis result for SHA-256 7deee0634dc1e681…

MALICIOUS

PDF

72.0 KB Created: 2021-02-14 02:40:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 57fcf84ff9ea99eeb93ea625ded8653a SHA-1: ab5b42d86df92bbb835b3627b5bbe8b3a45220ca SHA-256: 7deee0634dc1e6814e0a94259565f38e86a3a7741531a33a76e8f57944cc8be8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The ClamAV detection and ML classifier also strongly indicate maliciousness. The primary attack pattern involves redirecting users to a network of URLs, likely to host phishing content or engage in SEO poisoning.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://leonvi.ru/123?utm_term=buck+and+doe+silhouette PDF link annotation
    • https://cdn.sqhk.co/buxifuludo/hjijiiZ/banner_saga_2_random_events.pdfIn PDF document text
    • https://cdn.sqhk.co/rabuvimi/a4iiibQ/vowigidepojote.pdfIn PDF document text
    • https://mufuwavujove.weebly.com/uploads/1/3/4/0/134042856/gozagejuvux-gurosivisak-nokinaxobuve.pdfIn PDF document text
    • https://cdn.sqhk.co/filodomazora/ZRnjgc3/52807220008.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426820/normal_5ff91e1b88a57.pdfIn PDF document text
    • https://rubexanow.weebly.com/uploads/1/3/5/3/135346757/8679713.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387581/normal_6006227c90c35.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375353/normal_5feb3c0b276b7.pdfIn PDF document text
    • https://bibomezu.weebly.com/uploads/1/3/2/7/132710601/f685dd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454682/normal_5fcf2ea140d88.pdfIn PDF document text
    • https://cdn.sqhk.co/wazilisiko/bia1hdw/rubogebezakebugete.pdfIn PDF document text
    • https://mujavipaw.weebly.com/uploads/1/3/0/8/130874121/c2164a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392667/normal_6012175c8a776.pdfIn PDF document text
    • https://cdn.sqhk.co/towinomer/gjixhbp/jumble_classic_word_game.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
    • http://gigezevozaf.epizy.com/ragopomowopurutilejej.pdfIn PDF document text
    • http://riranamonag.rf.gd/nipepojusazovoke.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/79285357984.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/kdigo_guidelines_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/lumadiwawotegezezukimuva.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/perenegosevivifafefowu.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/47960491383.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/bomovofafotew.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_off0000d0ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0CA 4928 bytes
SHA-256: 0e0b5c194f6a016dd77acd937442c1af3adde14bab4b8ee937e1b6a0ab832561
font_01_sfnt_off0000e185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE185 10580 bytes
SHA-256: 58ac667fe05840019fbd404757102e1fd60bbf5a8120a47b3036b26664426844
font_02_sfnt_off000104c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C0 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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