Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf718ba529153cfa…

MALICIOUS

PDF

92.3 KB Created: 2021-03-28 17:44:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 6edd821a044972e23ce3ec74a5844292 SHA-1: eb2c287bcdf019254dfaf70be01d616096484717 SHA-256: bf718ba529153cfabf132abf6f7c76878f47855fb35066e608618ed0c2e31059
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many hosted on disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous URLs point towards an attempt to trick users into downloading further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://maypoin.ru/award?keyword=novel+ceros+dan+batozar+download+pdf PDF link annotation
    • http://yewes.fun/hp_elitebook_folio_9470m_usb_portsua5w8.pdfIn PDF document text
    • https://cdn.sqhk.co/jomawutid/ahgtYhF/25877388832.pdfIn PDF document text
    • https://teraxamexad.weebly.com/uploads/1/3/1/3/131380600/85b49.pdfIn PDF document text
    • https://niwitibu.weebly.com/uploads/1/3/1/6/131636677/boxaxofow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_6023bb637f96f.pdfIn PDF document text
    • https://cdn.sqhk.co/wovovoteg/7hg3G6i/fishing_planet_gar_glory_pack.pdfIn PDF document text
    • https://cdn.sqhk.co/dolafita/hhhi3k2/just_risk_it_chic.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489045/normal_5ff97246ba90e.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwodemo/iiyicMc/bugsy_malone_movie_poster.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475985/normal_600e0c278e314.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • https://cdn.sqhk.co/pupevadojas/yHm7Wge/vatefafog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383925/normal_6037c5297888a.pdfIn PDF document text
    • https://xotizirew.weebly.com/uploads/1/3/1/8/131855992/9712971.pdfIn PDF document text
    • https://sepoxoritafide.weebly.com/uploads/1/3/1/4/131438330/tosigutexobutan.pdfIn PDF document text
    • https://kewalagaxed.weebly.com/uploads/1/3/4/8/134864879/64f38591ec35c.pdfIn PDF document text
    • http://unosital.space/belgium_national_team_formation_20187dkds.pdfIn PDF document text
    • http://neo-tp.ru/troy_bilt_storm_2410_starting_instructionsh5d8p.pdfIn PDF document text
    • https://nenikekawudiw.weebly.com/uploads/1/3/4/4/134468161/verigejo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382629/normal_605aff9e20680.pdfIn PDF document text
    • https://woronawupewusor.weebly.com/uploads/1/3/4/6/134672267/346a5d9c2.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/sudevejerifu/75641951945.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/namevijogarisiwukinifuket.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE7 5200 bytes
SHA-256: 8117432f292c3cefcc747e7f1842ceee8f7333596a2ca1c6fa13f75375faa7a6
font_01_sfnt_off00010cba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBA 2400 bytes
SHA-256: 0f69a0cca92ff052c2690507198265505fd789baca0e47d5fa00d6b74c21da47
font_02_sfnt_off0001173c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1173C 11956 bytes
SHA-256: 512085f37e12d58ce7477009834c4fa48dfcd329e2206288f7d40d4032b65e8d
font_03_sfnt_off00013d5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D5C 17660 bytes
SHA-256: 649518afa0c4969914b5115a065125f31d948b1534be59820deac053c1ead405
font_04_sfnt_off000154c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154C1 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361