Malicious PDF — malware analysis report

Static analysis result for SHA-256 96dbbc76998cbf60…

MALICIOUS

PDF

73.7 KB Created: 2021-02-20 21:10:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: f92a6ac37b24abe1fc75ada8377d9797 SHA-1: 8b37caaca1391efa682d1a9644b091c17ee751ff SHA-256: 96dbbc76998cbf6053f17dc3d920876014631041b4c1909e90f1228bd19b2352
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=pdp+xbox+one+controller+review In PDF document text
    • https://cdn.sqhk.co/zezoxomop/eN0Hgeg/institutional_advertising_definition_marketing.pdfIn PDF document text
    • http://naderuromopuru.22web.org/38950009117.pdfIn PDF document text
    • http://instasale.company/lizojiroruxanidejuwunuhasdw.pdfIn PDF document text
    • http://callup.today/manimuvafavufiwewunmtfa.pdfIn PDF document text
    • http://handler-autoscout24.com/duzexifijifuguse47yru.pdfIn PDF document text
    • http://trixy-matrix.space/xajexopuwefobakavipijla55.pdfIn PDF document text
    • http://everydayy.fun/wexedasowurupajujry46l.pdfIn PDF document text
    • http://b0xberry.online/kavimeduwofodilesapokavorke9p1.pdfIn PDF document text
    • http://begetus11ppz.xyz/76544107494h9fwt.pdfIn PDF document text
    • https://cdn.sqhk.co/paxelababeg/hhdjiSz/fobakeva.pdfIn PDF document text
    • http://consumer-data-protection-bureau.com/the_naturals_book_5_read_onlineis7qx.pdfIn PDF document text
    • https://cdn.sqhk.co/temejikowewa/ijjjLt4/quiz_logo_game_answers_level_11.pdfIn PDF document text
    • http://pubifirona.22web.org/52007819288.pdfIn PDF document text
    • http://kisegojunu.22web.org/gunuduzozewebubumesufusi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/minabiwa/archer_c5_v4_firmware.pdfIn PDF document text
    • http://rijogutigoxek.epizy.com/slender_man_song_fandroid.pdfIn PDF document text
    • http://tisuvelepep.rf.gd/catalasa_fundamento.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/2002_vw_jetta_owners_manual.pdfIn PDF document text
    • http://nowivopikuzud.epizy.com/nozozanegesulevisanon.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_off0000e488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE488 5040 bytes
SHA-256: 8c79f69fccc8d80c3cdc55d119a65506ae16f7d70e2b203b311946513ff1bd9d
font_01_sfnt_off0000f5cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CB 10576 bytes
SHA-256: c776ad5207968490b0626884d0a1aa249812300b1816bc579d6e2c6a1a1cf7a6

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