Malicious PDF — malware analysis report

Static analysis result for SHA-256 74ba5efb14a4b408…

MALICIOUS

PDF

82.8 KB Created: 2021-06-02 07:27:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0784f846fe7ccbe7618d586259a41bae SHA-1: 89e501930e44b80aec1b6f3209ce4eafb22923cc SHA-256: 74ba5efb14a4b408ca93632ab09c7099c60fdacd95231bc371b61a32cb583483
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://laborke.ru/pbw?utm_term=the+kiss+of+deception+2+pdf+espa%25C3%25B1ol PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475219/normal_601947f09bd8d.pdfIn PDF document text
    • https://guludanujozif.weebly.com/uploads/1/3/4/6/134639787/9780261.pdfIn PDF document text
    • https://pudufanosi.weebly.com/uploads/1/3/4/3/134324904/8482235.pdfIn PDF document text
    • https://tugarekuxu.weebly.com/uploads/1/3/4/3/134307697/9044358.pdfIn PDF document text
    • https://pifabesi.weebly.com/uploads/1/3/5/9/135958575/79bd7aca.pdfIn PDF document text
    • https://jurutidi.weebly.com/uploads/1/3/5/3/135397820/foloxigomawur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412583/normal_605b841c57e1f.pdfIn PDF document text
    • https://xepuduwosijun.weebly.com/uploads/1/3/4/6/134634987/616123.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386086/normal_5ffa86cccdc48.pdfIn PDF document text
    • https://sagakoto.weebly.com/uploads/1/3/0/8/130814189/7418358.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487413/normal_5fe6708d7e2aa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tisowowuduwe.pbworks.com/f/20988432448.pdfIn PDF document text
    • http://pitevaj.pbworks.com/f/52925819865.pdfIn PDF document text
    • http://kipizasuzeda.pbworks.com/f/bepozajogudiwuzina.pdfIn PDF document text
    • http://gosirata.pbworks.com/f/54474208784.pdfIn PDF document text
    • http://duziruromeja.pbworks.com/w/file/fetch/144488541/performance_review_self_appraisal_answers_examples.pdfIn PDF document text
    • http://sodopateduke.pbworks.com/f/mini_militia_unlimited_bomb_ammo_nitro_game_download_apkpure.pdfIn PDF document text
    • http://pezeliv.pbworks.com/w/file/fetch/144426423/14101700238.pdfIn PDF document text
    • http://paditoxef.pbworks.com/f/tunepat_spotify_converter_review.pdfIn PDF document text
    • http://tusoxefum.pbworks.com/f/solidworks_exercises_free_download.pdfIn PDF document text
    • http://gonumutat.pbworks.com/w/file/fetch/144485409/powenakaxubijadobaxo.pdfIn PDF document text
    • http://lakebimutep.pbworks.com/w/file/fetch/144420897/borderlands_2_salvador_op8_build.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e91f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91F 5504 bytes
SHA-256: 6317c638d05c57fa674746f1c2f053b6c5237e2aa20185eaf7cabffcf15e7f7a
font_01_sfnt_off0000fb9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9F 11584 bytes
SHA-256: ee4c698b7df8a5aadfc143d735727cd33fe314f289d7afb554878731e51b489f
font_02_sfnt_off000121e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121E8 17380 bytes
SHA-256: 33b90bbcff73dd6910ee4227553d1232aac8839fa0467d0b6e4d1c495f3c4171