Malicious PDF — malware analysis report

Static analysis result for SHA-256 08e9a9e9ad66ca60…

MALICIOUS

PDF

81.1 KB Created: 2021-04-18 07:19:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 584812755081320e90c9cc157431f7e8 SHA-1: 78b25a6779cf75937883d08fe94a4f86b46503c8 SHA-256: 08e9a9e9ad66ca6082564376aef135973e177ab11a8939ce369ff1f8a316aa14
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The document body, though heavily obfuscated, contains text related to car valuations, which is likely a lure to direct users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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 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.
  • 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/strik?utm_term=how+much+is+a+2002+ford+focus+worth PDF link annotation
    • https://wawodupalise.weebly.com/uploads/1/3/4/6/134621762/xawapigadenubigen.pdfIn PDF document text
    • https://renunuvejo.weebly.com/uploads/1/3/4/7/134710344/sojefatosugo.pdfIn PDF document text
    • https://zoluvurodozi.weebly.com/uploads/1/3/0/7/130776250/xewel_tuzobe.pdfIn PDF document text
    • https://sovakevu.weebly.com/uploads/1/3/4/3/134341498/domazigosaboju-minokexubefog-bijija-jevuzose.pdfIn PDF document text
    • http://juborad.mywebcommunity.org/is_intermittent_fasting_just_a_fad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480399/normal_6057d1a96b32f.pdfIn PDF document text
    • https://zozizifubigidoz.weebly.com/uploads/1/3/1/4/131409074/gapozeko.pdfIn PDF document text
    • https://nibowivuxewanu.weebly.com/uploads/1/3/1/3/131379040/xumufojatejunir.pdfIn PDF document text
    • https://vogaxuruxav.weebly.com/uploads/1/3/4/3/134352923/665848b0f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408343/normal_602b88a151507.pdfIn PDF document text
    • http://kasaxeko.mypressonline.com/29807387891.pdfIn PDF document text
    • http://nebofimanigi.sportsontheweb.net/a_time_to_kill_movie_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403127/normal_5fd8f7bf32e22.pdfIn PDF document text
    • http://xajavawinereko.mywebcommunity.org/gigubozakunemat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480148/normal_602ad75e134a7.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
    • https://s3.amazonaws.com/ruzaganog/what_is_the_civil_court_system.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/identifying_unconformities_geological_maps.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/epidemiologia_e_sade_livro.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/todetuwor.pdfIn PDF document text
    • http://jasunusemoki.onlinewebshop.net/zapixapodenopezizasiwona.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32f8da87-393f-4f3e-ba14-2a3dfc214e35/pamafivuxubu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22fda304-790e-4fba-a19d-cda94a9c6297/communication_in_a_civil_society_textbook.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_off0000f097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF097 5216 bytes
SHA-256: 52627b379a2a18d423334b0859466d6a3c2ed8f3d90ff0806ff92274bf255f75
font_01_sfnt_off0001025b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025B 11300 bytes
SHA-256: 13f76da8fd3eea20fdbffae2c5ccf91338ca9026467d786a7082b41b56184317
font_02_sfnt_off00012815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12815 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176