Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e01b0221212e30d…

MALICIOUS

PDF

77.8 KB Created: 2021-03-20 14:42:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d860b2e8a2300a07af3ed5ef5e9e991 SHA-1: 4069a4563a465b69e877527a02cf30984e809bd8 SHA-256: 6e01b0221212e30d2937f95a5b4a995d3780e56630aa5d538a528ee5ac0899a4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which are dynamically generated and point to potentially malicious domains, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/aws?utm_term=how+to+put+technicolor+modem+in+bridge+mode
    • https://cdn.sqhk.co/gajamomol/hbjeHCJ/restaurant_business_plan_excel_sheet.pdf
    • https://cdn-cms.f-static.net/uploads/4427093/normal_601c02285e3fb.pdf
    • https://cdn-cms.f-static.net/uploads/4468823/normal_5fd2a25b7c008.pdf
    • http://com-connexion.xyz/lomemuzebukususomuw4ko8s.pdf
    • https://cdn.sqhk.co/tirabipati/hemjbgf/negesumul.pdf
    • https://cdn.sqhk.co/zexukobesu/jg5ii8A/98505401648.pdf
    • https://ruwijupoxotafan.weebly.com/uploads/1/3/0/8/130814308/1816112.pdf
    • https://cdn.sqhk.co/tarekekog/jcPbgex/suxebavevevijafilo.pdf
    • https://cdn-cms.f-static.net/uploads/4449417/normal_6054dfa28ef5b.pdf
    • https://loxajutuwaguxi.weebly.com/uploads/1/3/2/6/132681393/078cd44.pdf
    • https://cdn-cms.f-static.net/uploads/4370299/normal_602070db625ad.pdf
    • https://cdn-cms.f-static.net/uploads/4485309/normal_6036f3bc654be.pdf
    • https://cdn.sqhk.co/sawitofi/Q7LAhfU/bilezex.pdf
    • http://robolab.one/epson_wf_2630_patronen_nicht_erkannt7y29b.pdf
    • https://litisenos.weebly.com/uploads/1/3/1/0/131071047/3928664.pdf
    • https://cdn.sqhk.co/vusunuvaka/0UWM8jf/pat_answer_meaning_in_english.pdf
    • http://apsmall.space/wexevedosuju2177v.pdf
    • https://somirurawepaf.weebly.com/uploads/1/3/1/3/131381963/4887884.pdf
    • https://nenejiremox.weebly.com/uploads/1/3/0/9/130969141/65422ef65b84.pdf
    • http://ru-en.xyz/2703031406vo20o.pdf
    • https://wivixape.weebly.com/uploads/1/3/4/8/134897282/zepabosifikefu_fozemobofa_zaviguvepat_xusosapujun.pdf
    • https://cdn.sqhk.co/tezizejaropu/qNyEFia/city_builder_games_pc_2019.pdf
    • http://arthromedshop.xyz/2009_honda_accord_power_steering_fluid_change1fp48.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e590.bin
83ca7111a5ea536184555d80a3ce8c758b6c719339472acbcef2155cccdfb27c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE590 5172 bytes
font_01_sfnt_off0000f6ff.bin
85188eb7cae2fe123c6fafe05108c6798cf02f6c6a81394f2bab84da494e09c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FF 10624 bytes
font_02_sfnt_off00011b29.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B29 4324 bytes

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