Malicious PDF — malware analysis report

Static analysis result for SHA-256 05c2fbc5b0932d99…

MALICIOUS

PDF

67.1 KB Created: 2021-02-17 02:31:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f2086a7c17178771dbab5ed5600dec98 SHA-1: 9081b356343fe6c6b817a64dc4db3b163a392575 SHA-256: 05c2fbc5b0932d997c34d074e579d11e0bdd9a6bec68b529468a8c48cbe59129
116 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The 'SE_CALLBACK_LURE' heuristic strongly suggests a callback phishing or tech-support scam, where the document prompts the user to initiate contact via phone. The embedded URL points to a suspicious domain, likely part of the phishing infrastructure.

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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://baarspo.ru/aws?utm_term=bbva+compass+auto+loan+make+a+payment PDF link annotation
    • http://uaportal.site/difference_android_tv_to_smart_tvun880.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472200/normal_5ff06ed2b4921.pdfIn PDF document text
    • http://mikrotikwizard.com/boy_hairstyle_image_2017vj24w.pdfIn PDF document text
    • https://cdn.sqhk.co/zojixemem/dgijhum/20895789410.pdfIn PDF document text
    • http://whalesqpa.fun/lumion_tutorialquo80.pdfIn PDF document text
    • http://bodyita.space/11775704221gnpuy.pdfIn PDF document text
    • http://prizinsta365.website/bacterial_transformation_processwh5pg.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/bokofapig/capone_n_noreaga_the_war_report_cassette.pdfIn PDF document text
    • http://namavorudil.epizy.com/pelcula_el_principe_de_la_niebla.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/arya_dj_bhojpuri_song_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/40361534053.pdfIn PDF document text
    • http://gekekenam.rf.gd/chicago_bears_injury_report_week_3.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/game_mirip_animal_kaiser_di_android.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/inditex_financial_report_2019.pdfIn PDF document text
    • http://noxexisotagizez.epizy.com/graphene_tutorial.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_off0000c918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC918 5400 bytes
SHA-256: a323888f5cd1e25b63ff52073caf11d0d3d205af828f1d6bb67d1bf467ecb6d3
font_01_sfnt_off0000db73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB73 10672 bytes
SHA-256: 012cd4bf9f8c051255738d974851a95cb46c24f9724effe9f179a7a9a4ae1b99

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