Malicious PDF — malware analysis report

Static analysis result for SHA-256 29c26afb8bc45d2b…

MALICIOUS

PDF

87.7 KB Created: 2021-02-21 21:08:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 7395acaf5da7018f4350ad8f123c31a7 SHA-1: d57b5ef21bcc548f68e204aab920fe4aa078333d SHA-256: 29c26afb8bc45d2b63348a189ba2c181a11b3d86e1529aee16ea9799bee7255f
184 Risk Score

Malware Insights

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

The PDF document contains embedded links that point to known malicious redirector infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though partially corrupted, suggests a lure related to 'Resumen cien años de soledad capitulo 11'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=resumen+cien+a%25C3%25B1os+de+soledad+capitulo+11 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4476936/normal_5fe97e8904686.pdfIn PDF document text
    • https://cdn.sqhk.co/kepebeso/haibhc6/77374095454.pdfIn PDF document text
    • https://cdn.sqhk.co/gegawudaxaxi/cOWhjSL/cheats_for_gta_5_xbox_360_offline.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492250/normal_600a0847b4abc.pdfIn PDF document text
    • http://tb-films.ru/8400355138793136.pdfIn PDF document text
    • https://cdn.sqhk.co/xelajuwodaf/dgfFKhf/jatorusazufuvajaxipabaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446029/normal_5fd8b8c32822a.pdfIn PDF document text
    • https://cdn.sqhk.co/jesotipo/gHhjVgj/petroleum_engineering_colleges_in_canada.pdfIn PDF document text
    • https://cdn.sqhk.co/gidufulelav/bihjjfw/5037149354.pdfIn PDF document text
    • http://opssmall.space/nujilapubowovajemudecohd.pdfIn PDF document text
    • https://cdn.sqhk.co/tebefaravuz/gN1jeg7/miraxikexesufezoleso.pdfIn PDF document text
    • https://cdn.sqhk.co/bexoninodag/ghhhDO1/strikeforce_kitty_league_download.pdfIn PDF document text
    • http://kindraretterath.com/912614705963y685.pdfIn PDF document text
    • http://copyright-notice-ig.com/browser_button_crosswordewwwo.pdfIn PDF document text
    • https://cdn.sqhk.co/fajaleniwa/KEkjhal/multiplayer_driving_simulator_hack_apk_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366371/normal_60203ad3dba6f.pdfIn PDF document text
    • https://cdn.sqhk.co/gederanew/bgdTiir/8329034139.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mogivinisisa.epizy.com/between_the_lines_app_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/vatofoluzopofiket.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/hyrule_warriors_legends_illustrations_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wizakokowe/45332999491.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/coastal_watch_surf_report_cronulla.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_off0001189c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1189C 5392 bytes
SHA-256: 7e6f08edd8f5ab7f07708df59d8de448fbd0ed1c62a44b7ede545479e7dd989c
font_01_sfnt_off00012aa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AA8 11184 bytes
SHA-256: a24c9fa635d1c42fbeaf65cfb08f8223f062e229d54b1920e65e69d86b13883b

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