Malicious PDF — malware analysis report

Static analysis result for SHA-256 94dc26b2ed329e8c…

MALICIOUS

PDF

78.1 KB Created: 2021-03-18 19:50:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 94d983c7e3e36e65093770497e96dde3 SHA-1: 5b72ff1e8190b0b0339ec42a62b2d80622c5a0f4 SHA-256: 94dc26b2ed329e8c9faa35077f598832fdfdeefa8b746a2f54c7eec3ab765942
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, with one pointing to a suspicious domain 'botokaw.ru'. 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 URLs suggest it's 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://botokaw.ru/123?utm_term=counting+money+worksheets+for+2nd+grade PDF link annotation
    • https://cdn.sqhk.co/posojuvapono/dAR8KNy/webapodemujeda.pdfIn PDF document text
    • https://cdn.sqhk.co/nogegamapagi/hehjckf/air_hockey_challenge_hack_apk_download.pdfIn PDF document text
    • http://astrology-personal.online/betodapanumuwegui7w02.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/hffjgjT/boruwuwuperoguvilivugeze.pdfIn PDF document text
    • http://letnesil.xyz/800664702701sevy.pdfIn PDF document text
    • http://reduslim-italia.website/75520898812vaa3j.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxeromewime/rFidvjg/sell_second_hand_clothes_online_dubai.pdfIn PDF document text
    • https://cdn.sqhk.co/xosujopi/xif4icr/custom_roms_for_android_4._2.pdfIn PDF document text
    • http://sfhgfje5df.xyz/heterocyclic_compounds_notes1losl.pdfIn PDF document text
    • http://alesyasemiletova.com/zeginemimuguwetamuniviluqaxgy.pdfIn PDF document text
    • http://zhenskiizhurnal.ru/how_does_a_jandy_check_valve_workzks1g.pdfIn PDF document text
    • http://salearea.pro/kesagu0no48.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/wujodibu/abhimaan_movie_song_bengali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3771f377-9171-45e5-8c77-6b9a1c3ae3b0/when_did_the_first_outlander_book_come_out.pdfIn PDF document text
    • https://e4da1597-3bb3-488b-9226-7c2c9e06e9ce.filesusr.com/ugd/db5d73_fa7d9622ec5e4da987c1e948fb20fae4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c89bb525-a66c-477b-bdf6-71806bdce8bb/95277905390.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/fullstack_react_native_github.pdfIn PDF document text
    • https://6d251753-49d0-4f5b-a278-10ed1cacc9d0.filesusr.com/ugd/5c139a_dde8e1f2c6b449f9b4f0eba7e8b0f9a3.pdf?index=trueIn PDF document text
    • https://4c6480a9-ccec-4c20-853c-cc48681c44ad.filesusr.com/ugd/935adc_e916e75c08a344fda61f61df9d3fa6cb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/46161211-1783-42b9-b61b-2cf483e4b5d7/hoover_windtunnel_pro_vacuum_manual.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_off0000f0c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C9 5584 bytes
SHA-256: 754a7d2647ecf7dca8ec3cc536044b6dc6c7c472b9717661a8c4cd154480ed94
font_01_sfnt_off000103b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B4 10992 bytes
SHA-256: 9003420a5660ce11331072bc793221ff532853b8eb95d7a3362a9bc0e80311cd

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