Malicious PDF — malware analysis report

Static analysis result for SHA-256 89bf48111b63d2d6…

MALICIOUS

PDF

68.4 KB Created: 2021-02-20 00:53:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 044e5333c74e2a267218c84dc633737d SHA-1: 093ebf8f40b774b5551003fc91fc28f95f8b27b0 SHA-256: 89bf48111b63d2d6957ea226195e64a5e2b07bbf04e4ebb31fe005317b16d704
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to suspicious domains, with one heuristic specifically identifying it as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The file likely serves as a lure to redirect users to phishing sites or download further malicious content.

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
  • 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://crophysi.ru/wix?keyword=royal+auto+service+cortland+ny In PDF document text
    • http://rupebakonodeja.iblogger.org/delta_air_lines_lands_end_uniforms.pdfIn PDF document text
    • http://goldenframecollision.com/suganisezerupunarulirutgfo1t.pdfIn PDF document text
    • http://gefupokilive.iblogger.org/jewavipotimuji.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489994/normal_5ffe939927729.pdfIn PDF document text
    • http://connexion-amelii.xyz/tufovimzkw.pdfIn PDF document text
    • http://polfact.site/solubivafovogumopazilefas6qk.pdfIn PDF document text
    • http://herss.space/44767532695kpep6.pdfIn PDF document text
    • http://shopsmmv.site/86384321844ad5y6.pdfIn PDF document text
    • http://giocodigital.fun/nezagibawivifilewer7jb7.pdfIn PDF document text
    • https://cdn.sqhk.co/zujijivopuju/kxxgiiL/physics_mcq_questions_class_9_motion_with_answers.pdfIn PDF document text
    • http://allostar.buzz/oppo_r15_launch_date_in_indiaf7xo6.pdfIn PDF document text
    • http://zoomita.space/delovnwyw2.pdfIn PDF document text
    • https://cdn.sqhk.co/kekelivig/9ngc9Kj/49303271283.pdfIn PDF document text
    • http://nizuloxodiza.iblogger.org/17123905702.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/jghfPEj/64754667224.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454819/normal_602fc746bbec1.pdfIn PDF document text
    • http://tertov.xyz/my_smart_hands_alphabeti3kai.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372963/normal_5fca925c03065.pdfIn PDF document text
    • https://cdn.sqhk.co/donuvoduvedo/ggifyhg/backhanded_compliments_funny.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nuvipapijulabu.epizy.com/new_bottle_feeding_guidelines.pdfIn PDF document text
    • http://pebulibupa.rf.gd/gatemavapa.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_off0000d01d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD01D 5104 bytes
SHA-256: 2a9ac7146e6c8cec1d8253cde7abb5a50dcb7e03137c1164b4ec62a013e815ca
font_01_sfnt_off0000e196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE196 10268 bytes
SHA-256: d5faaa3e701c05fea3f37e7deb220bd2b5e9f627b312646d69ca8bcbcc9d7665

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