Malicious PDF — malware analysis report

Static analysis result for SHA-256 13969bf1d0c497a0…

MALICIOUS

PDF

87.4 KB Created: 2021-03-17 18:23:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 2f069cf727a6c86dfea4ee9edb3e9012 SHA-1: 90b25e3bf5109206288718ec4e27eeb216e0d4d3 SHA-256: 13969bf1d0c497a0da6fc5852b9e6a9acac57cc78286bf78ce2fc146b328f2b4
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one pointing to 'ponafet.ru', which is flagged as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though garbled, suggests a lure related to educational content to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://ponafet.ru/wix?keyword=holt+mcdougal+earth+science+chapter+6+review+answers PDF link annotation
    • http://4kuhd.me/newamuxakopokd0aem.pdfIn PDF document text
    • https://cdn.sqhk.co/wepugozotap/dXghOvG/nifegifajatamedijufimever.pdfIn PDF document text
    • https://cdn.sqhk.co/lovojekaboxi/jgBhebM/sepukupigiwu.pdfIn PDF document text
    • https://cdn.sqhk.co/xazewizol/hgidgef/19099254956.pdfIn PDF document text
    • http://nosinoski.shop/dbq_focus_the_spread_of_islamic_civilization_answer_keyn2abo.pdfIn PDF document text
    • https://cdn.sqhk.co/xonepogafix/dmhcgif/business_administration_major_in_operations_management_description.pdfIn PDF document text
    • http://detonic-romania.website/why_isn_t_cannonball_run_streamingcpbki.pdfIn PDF document text
    • http://qwertyujg.xyz/meaning_of_neighbourhood_in_marathijx8hq.pdfIn PDF document text
    • http://tublitalia.fun/11841228898480x5.pdfIn PDF document text
    • http://help-bluebadgecenter.com/62260164109hz3jn.pdfIn PDF document text
    • https://cdn.sqhk.co/butiluluvuk/cr3hdRi/simple_modern_cup_moon.pdfIn PDF document text
    • http://allerop.xyz/what_is_the_nist_cloud_computing_reference_architecturenhazx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/800c59ae-e237-4994-89e5-d0320aa45342/disadvantages_of_transformational_leadership_style.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/java_bangla_tutorial_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/69189191345.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/pfc_boost_converter.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/ladijojijuvasaguw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abaf2505-d4c0-472d-8b8b-8a5be88d9bea/foser.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/88745232899.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/rockabye_english_song_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3142ed0c-7b3a-4f14-b9d4-0c661524c381/najogevevikebororazot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62d66296-e46c-4928-b990-a176cfcc5d17/3_canvas_painting_ideas_easy.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E5 5636 bytes
SHA-256: 7681b5fa477d3d661b933169351d6d623ac382f7e5219a09df943a540f2c8290
font_01_sfnt_off000119f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F3 11732 bytes
SHA-256: 16e8c0cd7a56cf70e7ac284e3f641e2cf1a0bc493bba965ad1403ef08b67d008
font_02_sfnt_off000141e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141E8 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

Open this report in the interactive analyzer, or submit your own file for analysis.