Malicious PDF — malware analysis report

Static analysis result for SHA-256 f67aeb7aa0bd75d0…

MALICIOUS

PDF

203.4 KB Created: 2021-03-21 01:56:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d93db9846517ad26d7fb4b09d3b7dc94 SHA-1: 10cda08e1ea464c03bd5a7b7fa307fc97393e34a SHA-256: f67aeb7aa0bd75d08207b2fe87d9e1752de102e9fac259d56f5753a472075fe1
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains heuristics indicating it is a phishing lure, potentially related to invoices or callback scams. It embeds a URL pointing to 'dafemum.ru' which is suspicious and likely serves as a delivery mechanism for a malicious payload. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://dafemum.ru/wix?keyword=stryker+power+pro+xt+manual PDF link annotation
    • https://cdn.sqhk.co/gitovera/gifgcuZ/drones_attack_saudi_oil.pdfIn PDF document text
    • http://richmaya.site/blood_episode_1wir5r.pdfIn PDF document text
    • https://cdn.sqhk.co/siripeka/ggidGVT/rc_flying_simulator_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/2fjdugc/candomble_religion.pdfIn PDF document text
    • http://voiprormul.xyz/23736415665g3skb.pdfIn PDF document text
    • https://cdn.sqhk.co/zujubiviv/Kgggdjc/princess_wedding_dresses_dress_up.pdfIn PDF document text
    • https://cdn.sqhk.co/torujazelome/ggicigh/rubiviguruvujenebevekat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a12a05ab-6462-4855-b086-b0a2a961d6d8.filesusr.com/ugd/2c76f4_929b93d2c8794deaaaf8dda641726b15.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tulosa/93568808508.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afe5fca9-836f-4c61-bef9-dc12f9f4d24f/jozorewoxewodadifenubat.pdfIn PDF document text
    • http://notavopanugatog.epizy.com/58477284696.pdfIn PDF document text
    • http://dopalereniga.rf.gd/28834892194.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/tojukovepofupokisogexefit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b52c3cc8-b02c-4211-bfd6-c3ce2023ecda/37971127175.pdfIn PDF document text
    • http://rusakarazixano.epizy.com/best_speed_for_netflix.pdfIn PDF document text
    • http://xakexuxav.rf.gd/goferepuke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ae3471e-bda2-45bf-abf4-3705b97a4a8e/92651146758.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/copleston_history_of_philosophy_volume_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af2f52a8-4edb-4f12-abb8-94027da6824b/what_is_empirical_knowledge_in_nursing.pdfIn PDF document text
    • https://0b670cc3-d94b-4117-8b98-7ce677fb6c21.filesusr.com/ugd/7bc559_f66fe04fe8be462d959a0d6598a76c8a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jifesu/fewupoli.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_off0002dfed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DFED 5216 bytes
SHA-256: 2a4e4823b231ac0b00adebd65375ea2de6e811692571c88a12edea150d432495
font_01_sfnt_off0002f1b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F1B3 14204 bytes
SHA-256: 63b3d8b2e0f94a2fd080b2a94004b52f3b47e6a233e199bfa4771e0f4fb44877

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