Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ee4ef04cf6f6f42…

MALICIOUS

PDF

168.5 KB Created: 2021-03-20 09:26:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: eac790c3a3e0843668df36bc8011894a SHA-1: 1ba91cc45dfc1bc8b105ef85c4d91f86ce6ffeb0 SHA-256: 1ee4ef04cf6f6f4223298252181e70d5f686de45a15ceb5f81797ec125da5343
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://jumiwimov.ru/strik?utm_term=is+aggression+good PDF link annotation
    • https://vakumijajuxos.weebly.com/uploads/1/3/4/4/134465568/4322391.pdfIn PDF document text
    • http://fevozogu.iblogger.org/13563861876.pdfIn PDF document text
    • http://pixell.store/mukoxepasevoxoxopufasowur0bysn.pdfIn PDF document text
    • http://catsism.com/kuroxutujexebobesulogimudkxguj.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/ehgvjjA/40725346615.pdfIn PDF document text
    • https://pinabufibofux.weebly.com/uploads/1/3/2/6/132682338/834238f57c310.pdfIn PDF document text
    • https://cdn.sqhk.co/toriwogadej/4Hhgg0e/street_fighter_apk_unlocked.pdfIn PDF document text
    • http://kayikciakademi.com/alcoro_baixarz6rpx.pdfIn PDF document text
    • https://cdn.sqhk.co/xenudipu/icagdje/48141431654.pdfIn PDF document text
    • https://cdn.sqhk.co/leribunopa/asVVjdD/vewado.pdfIn PDF document text
    • https://pisubudanumiz.weebly.com/uploads/1/3/0/8/130874058/f07d6c16367d.pdfIn PDF document text
    • http://osthondroz.com/pool_closing_instructions_in_groundk079o.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://7f2467c6-0d80-4e38-8df7-27624e0b9669.filesusr.com/ugd/e19533_5a9f6b4f24064e91ae28dbc98839d327.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cc23f5a-c5f4-4419-be31-466bb476b41e/how_to_program_a_radio_shack_scanner_pro_2015.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6016968-5c10-4253-9a6d-1d7e5fe5b096/jakks_pacific_spynet_night_vision_goggles_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e16da011-0da0-49ef-864c-9c0aa2a49138/51798918335.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1156a80-9f83-4595-a179-b8f8cbe74a24/misavibadasugibopa.pdfIn PDF document text
    • http://zarazemudaseri.epizy.com/miripiwebug.pdfIn PDF document text
    • https://6ba7316d-b84b-4ccb-a32a-103c856d4013.filesusr.com/ugd/91f37e_f8972c6b6e4440a0bc1d3432d63934cf.pdf?index=trueIn PDF document text
    • http://kerowet.epizy.com/guitar_chords_chart_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf165189-5729-40cc-987c-f818054e01f8/unwind_book_series_order.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_off00024994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24994 4608 bytes
SHA-256: 49810d1a15137776bd8fa59ad50150a49134e8279bdcade224101b4562e767d6
font_01_sfnt_off00025932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25932 14064 bytes
SHA-256: adc6e3c15f23a255d5755dbc08d669589903e25c1c813e69d2e78d32f9f38f7c
font_02_sfnt_off00028628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28628 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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