Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c02ae7fc85b41c4…

MALICIOUS

PDF

74.3 KB Created: 2021-03-22 05:12:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 40ed6ffd1edffd2cc1cd83d2294ea96d SHA-1: d53a7425ca981f53a496659443df7a2f312e506d SHA-256: 2c02ae7fc85b41c461e84f72650ab2d450ec5d12d6bf18c8fc3c4a119f6d1a25
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm and by a machine learning classifier as malicious. It contains numerous external links, many pointing to disposable hosting, suggesting an attempt to obscure the ultimate destination. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely to lure users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/award?keyword=advanced+cardiac+life+support+book+pdf PDF link annotation
    • https://cdn.sqhk.co/bapisolel/pxUghK1/camera_control_pro_2_nikon_d800.pdfIn PDF document text
    • http://instapresent.site/biographical_sketch_examplejjg7e.pdfIn PDF document text
    • https://cdn.sqhk.co/jogekiluse/jhhih74/ufc_fight_pass_app.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonaxadu/e0zhh1U/33862146534.pdfIn PDF document text
    • https://cdn.sqhk.co/mepapogivoma/aggifib/ragixulujova.pdfIn PDF document text
    • https://cdn.sqhk.co/poxufape/ggicab7/liar_s_dice_pirates_of_the_caribbean_rules.pdfIn PDF document text
    • http://mishabelle.ru/what_are_your_strengths_teaching_interview57ked.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/hhjdhid/43068504625.pdfIn PDF document text
    • https://cdn.sqhk.co/tobowovum/jcibigy/.pdfIn PDF document text
    • http://proflist-briansk.ru/expertopup_recharge_programkc18r.pdfIn PDF document text
    • https://cdn.sqhk.co/sadebupunen/6jj5kOR/sniper_traffic_hunter_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/wazilisiko/lghhew5/hoop_basketball_nets.pdfIn PDF document text
    • https://cdn.sqhk.co/xufojidaju/CgcgfT4/3314163314.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f37c3615-20b0-4e70-b1e7-2acf34113780.filesusr.com/ugd/1e533a_59b68ce946484b9988d9c5fc606ea94e.pdf?index=trueIn PDF document text
    • https://8767aa75-4bd5-48c0-94ca-24e983238001.filesusr.com/ugd/debdc1_b3f416fcda2945d08932df9dd4c194a1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tosego/student_artist_statement_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dbb846c-17f7-4024-a5e3-a224a48af01f/15139029079.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/why_is_eleanor_and_park_a_good_book.pdfIn PDF document text
    • https://0df22b04-17ae-4e65-9af8-3af4445b4601.filesusr.com/ugd/71fd01_6cb32472e7a040d1836403f13832198f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d7b8642-9af0-4170-827b-fc3de1dfe920/dibesuzobazomizolidobi.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/xogajegikavijopexisub.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/jozodedetugowegulezoguj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ead618e4-a07b-4c38-99a5-a02d6f4a4aab/zowixigege.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfdeaa2f-aa7f-469f-a496-080efae15c6b/temple_of_seti_i_at_abydos_egypt.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_off0000de65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE65 5400 bytes
SHA-256: d8d24dc91b92027029488dc095ffaf7196f304659bef0995ae23096b8b39d814
font_01_sfnt_off0000f0d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D9 13480 bytes
SHA-256: cbfc94c624d91c7f94520c32bf0d7070c2ce6aece5980db8951625a24eef140c