Malicious PDF — malware analysis report

Static analysis result for SHA-256 99db3e0a5071fb7c…

MALICIOUS

PDF

122.1 KB Created: 2021-03-28 13:10:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: eea028682ecfccb65c9601d4d2d51aaf SHA-1: c5b581d1f539fd54794c240904bbdb5b09848724 SHA-256: 99db3e0a5071fb7cfed705e80e074c6e7d805fbdc95e9185053463cb5fec7d85
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous external URIs, with one notable URL pointing to 'maypoin.ru', suggesting a phishing or malware distribution attempt. The PDF's structure indicates it functions as a link farm, likely designed to redirect users to malicious content.

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
  • 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/wix?keyword=cuban+revolution+map PDF link annotation
    • http://zujakupuk.22web.org/jnu_admission_form_2018_ug.pdfIn PDF document text
    • https://kukotefuses.weebly.com/uploads/1/3/1/6/131637352/4612203.pdfIn PDF document text
    • http://waliwosodumobu.iblogger.org/bluestacks_android_emulator_for_pc_windows_10.pdfIn PDF document text
    • https://magudutetu.weebly.com/uploads/1/3/1/4/131437318/rarugusagapi-peguwem.pdfIn PDF document text
    • https://fovepupaveveri.weebly.com/uploads/1/3/1/3/131384368/983567f9a.pdfIn PDF document text
    • https://jodavetofa.weebly.com/uploads/1/3/1/4/131438562/bd9b5c.pdfIn PDF document text
    • http://palovedu.22web.org/100_literary_devices.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5053e88e-9e18-4719-890c-32a1cca0295d.filesusr.com/ugd/411503_5e83d6290306452dbee10b5ca1716999.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/27077231481.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/coronation_street_theme_tune_sheet_music.pdfIn PDF document text
    • http://xibunagevidaze.rf.gd/pugizevobalorizikuzes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4026e798-f89a-4861-ac82-2356f2baa015/par_quoi_remplacer_la_mazena_dans_une_recette.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fae517b-bb02-4a2a-9061-6858c50dfa4a/3655835436.pdfIn PDF document text
    • http://nugifola.rf.gd/69786042367.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52cea9c0-7653-4aa9-9270-8e18d4f7f647/28483211494.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/pan_card_offline_form_procedure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b933ad18-bab7-4aff-a01a-b0aad8ef6eba/is_it_bad_to_be_straightforward.pdfIn PDF document text
    • http://pasufok.rf.gd/wubokupamonuxolemiwan.pdfIn PDF document text
    • http://kudawugijamino.rf.gd/8661206339.pdfIn PDF document text
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_46ccdbfa5a504c91ba380015e4f22824.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/nomitizofebuvip.pdfIn PDF document text
    • https://37bcb4aa-7747-4ff6-a352-0e22bf983c21.filesusr.com/ugd/4393d3_81b95ce19b054c6ab92110250778ea7a.pdf?index=trueIn 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_off0001a0a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A0A0 4892 bytes
SHA-256: 183ba03f49736a171740d43d5986bce8f2cb11e88152c4dfddf38abd69625b7c
font_01_sfnt_off0001b12a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B12A 12764 bytes
SHA-256: 871a4bd906cf4be7117753274e610fe1cb3e4daf86c0869762bbe9e1f78d480a

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