Malicious PDF — malware analysis report

Static analysis result for SHA-256 f664c063651c674b…

MALICIOUS

PDF

82.0 KB Created: 2021-03-14 16:04:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a691442d0b50953924db3487c5d65428 SHA-1: 4e93d5637869aa4da1e504f6cddb54edb4cfbac3 SHA-256: f664c063651c674b98df06f18f0932f6f8df02276e1e52e25cefac01621c9c09
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are hosted on domains commonly associated with SEO link farms. The primary URL, 'https://botokaw.ru/strik?utm_term=how+do+you+clean+furnace+ignitor', suggests a lure to trick users into visiting malicious sites. While no scripts were explicitly extracted, the PDF structure and extensive link farm heuristic indicate a phishing or redirection attempt, likely to deliver a secondary payload or lead to credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=how+do+you+clean+furnace+ignitor
    • https://cdn.sqhk.co/josozudibud/2GhtfGE/torujadonuraf.pdf
    • https://cdn.sqhk.co/ketejeti/w5icijK/61369100126.pdf
    • https://cdn.sqhk.co/negapevu/jf74jek/dragon_kingdom_2018_cast.pdf
    • https://cdn.sqhk.co/sixepatexup/dOif5B4/digikala_magic_keyboard.pdf
    • https://cdn.sqhk.co/rumunefa/PpwDjh2/mobas.pdf
    • https://cdn.sqhk.co/wabasenenem/iijhv6E/wuwuzakeveko.pdf
    • https://cdn.sqhk.co/wejafivelij/ipCihhb/38395152540.pdf
    • https://cdn.sqhk.co/vinogusi/Cjhicgc/sniper_3d_gun_hack_version_download.pdf
    • https://cdn.sqhk.co/begokaxawip/LJghEGp/53560944978.pdf
    • https://cdn.sqhk.co/ludukuni/hfjwg9F/evil_lands_online_action_rpg_apk.pdf
    • https://cdn.sqhk.co/gisepavuv/YjgDiin/okay_thank_you_in_spanish.pdf
    • https://cdn.sqhk.co/tisufupujeli/hdC0UFp/dragon_ball_bubble_tea.pdf
    • https://cdn.sqhk.co/vujaderaz/ggyVhbr/modern_warfare_beta_instant_gaming.pdf
    • https://cdn.sqhk.co/lobinazema/PFhaSnU/guess_the_picture_close_up.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/5453a61d-bd37-407c-b0ae-d85cf984ca5b/14902450103.pdf
    • https://4a39c6c9-989b-4d11-b2d8-cc0becc7f193.filesusr.com/ugd/ef0078_7a0fbb539e88452fab01e5606c82a125.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9e717675-9145-4d2f-8af2-64028aaffa2e/alcatel_i-211m-l_specs.pdf
    • https://uploads.strikinglycdn.com/files/9d3a55d2-5127-455a-94b1-ccd04d0322d8/c_d_dog_food_coupon.pdf
    • https://34e2f0dc-0077-42bd-a047-efa2502e92af.filesusr.com/ugd/8a05ec_cd13a94a7b254f588c36fe4e9f3435aa.pdf?index=true
    • https://uploads.strikinglycdn.com/files/956db440-1ade-45a2-ad67-28484a9719d1/logabi.pdf
    • https://uploads.strikinglycdn.com/files/c3ddf5c9-be3f-4b5f-b5d1-6a7db1a01562/senuledexi.pdf
    • https://uploads.strikinglycdn.com/files/bef4e75c-d58c-465f-b41b-60004444ad64/gimp_help_lines.pdf
    • https://86f5e18a-8766-4ae7-b9bf-31430b627380.filesusr.com/ugd/911c12_ef76073241d04c34a129447459b1e131.pdf?index=true
    • https://uploads.strikinglycdn.com/files/89ba016d-de2b-4151-b414-198dbd74879c/21312331305.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f497.bin
b14669484db52995e7c0672e50a3010ebf3735596a9bf7042c42e306ea7d0256		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF497 5048 bytes
font_01_sfnt_off000105e5.bin
e06f79917e024618ec9949fd182800927265ed08606b1324d1b356eec4135120		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105E5 11252 bytes
font_02_sfnt_off00012c0c.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C0C 4324 bytes

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