Malicious PDF — malware analysis report

Static analysis result for SHA-256 6db9dc2afdd131b7…

MALICIOUS

PDF

70.1 KB Created: 2021-02-14 21:04:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 6176d7debdedc3ef5a64bfe903c6f818 SHA-1: b532bf27eccafbad6bb277ac5c73c9f4184ac07a SHA-256: 6db9dc2afdd131b70436cc7128cb0d99354ee82b15ebcbebe4a44754efe0134a
126 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic and the numerous extracted URLs suggest the document is designed to redirect users to potentially malicious or phishing sites. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/123?utm_term=screaming+meanie+alarm+clock+amazon PDF link annotation
    • http://leomannapov.com/98919750770rpsyb.pdfIn PDF document text
    • http://lnstagram-blue-badge-form.com/vatasolubajonefalobawjtkor.pdfIn PDF document text
    • https://cdn.sqhk.co/xekemini/jhc4u0S/jobetowofe.pdfIn PDF document text
    • http://worldthailand.fun/607777607715mgvh.pdfIn PDF document text
    • http://bobr.space/digital_control_system_analysis_and_design_4th_edition00q28.pdfIn PDF document text
    • https://cdn.sqhk.co/gusiloxi/ifM5iOj/62562305275.pdfIn PDF document text
    • http://onatural.space/xazuzowelavatuga2xa20.pdfIn PDF document text
    • http://form-lnstagramverifiedbadges.com/883313433436fvmx.pdfIn PDF document text
    • http://stylecurtains.com/gaxigaramizvrh0.pdfIn PDF document text
    • http://want-seo.ru/transferir_game_center_para_android6wfvi.pdfIn PDF document text
    • http://vertigoa.online/are_all_bacillus_spore_forming56djn.pdfIn PDF document text
    • http://itmax.info/balam_ji_love_u_movie_song8h5s5.pdfIn PDF document text
    • http://eslivdrug.space/pedurolopakuwesosibegakiwnl2v.pdfIn PDF document text
    • http://onesmall.space/alcoholic_liver_disease_acg_practice_guidelinesesq31.pdfIn PDF document text
    • https://cdn.sqhk.co/pibexezases/hajjijp/58118684512.pdfIn PDF document text
    • http://top-salez.site/gobegipafujimubujorifutrnrd.pdfIn PDF document text
    • http://monoga.space/print_calligraphy_practice_sheetstotql.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://javidukasomeg.epizy.com/apprendre_le_francais_pour_les_debutants.pdfIn PDF document text
    • http://vofofoduwegakuv.rf.gd/bluebeam_revu_extreme_slip_sheet.pdfIn PDF document text
    • http://gulejarapexovut.epizy.com/binary_calculator_app_android.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_off0000d0c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C7 5160 bytes
SHA-256: 143b077e58a775f8ad824f82decd93aed188ecd696bd59cc21e43a8e132bfc3c
font_01_sfnt_off0000e247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE247 12416 bytes
SHA-256: 87db352657670d82207a5b519a94c5f548f6612e93e3fe6c7f15079c200396d2

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