Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6503c19a355dbcb…

MALICIOUS

PDF

76.0 KB Created: 2021-03-28 05:30:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21a2465396823686afb52ec3d63fac05 SHA-1: 18c85071493e7c964b3e1bd15147f6775fb859a9 SHA-256: d6503c19a355dbcbb4b61d7269fd99980bd41bcc82f3ce58a2b98fdaaeca832d
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, flagged as a 'PDF_SEO_LINK_FARM'. One of these links, 'https://soxebez.ru/123?utm_term=does+cloudready+support+android+apps', is directly embedded in the document. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', indicating a phishing or trojanized document. No scripts were extracted, but the presence of numerous external links suggests an attempt to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://soxebez.ru/123?utm_term=does+cloudready+support+android+apps
    • https://bufuxilanu.weebly.com/uploads/1/3/4/4/134402831/bawamup-xixagaweza-sizinojed.pdf
    • https://luvijitakum.weebly.com/uploads/1/3/4/6/134685142/zatakaxur-mudexese-taxipovefimaf.pdf
    • https://cdn.sqhk.co/tugadeboda/fYgcuhe/what_is_ding_dong_ditch_on_facebook.pdf
    • https://guzaxogovi.weebly.com/uploads/1/3/4/6/134651677/9944736.pdf
    • https://bewabolome.weebly.com/uploads/1/3/5/3/135347927/f2659f08490fa8.pdf
    • https://lekofubazag.weebly.com/uploads/1/3/1/8/131872104/fcb8190d6702f8.pdf
    • https://jipafedi.weebly.com/uploads/1/3/0/8/130813136/22244.pdf
    • http://pazobano.iblogger.org/15813182733.pdf
    • https://supuzuvafexag.weebly.com/uploads/1/3/5/3/135383103/bab6a3a9.pdf
    • http://tozufokoxogo.22web.org/mugijesezaxudipojuloj.pdf
    • https://cdn.sqhk.co/xivomojuf/hyicigh/retro_video_game_music_maker.pdf
    • https://cdn.sqhk.co/selodiro/FjfNWje/62419756212.pdf
    • https://gokixojegesefa.weebly.com/uploads/1/3/4/8/134864476/vatumabo-pojimuta.pdf
    • https://vuxutuwatojo.weebly.com/uploads/1/3/4/6/134625262/9829218.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d55740fb-4102-4c1b-9890-71aa3e344074/fisher_and_paykel_dishdrawer_fault_codes.pdf
    • https://uploads.strikinglycdn.com/files/89e93f47-8fee-4ff6-88f7-04975b2ed320/80732408513.pdf
    • https://uploads.strikinglycdn.com/files/d84e0cff-50db-48ae-b5db-7c022911e902/commerce_and_slave_trade_compromise_date.pdf
    • https://uploads.strikinglycdn.com/files/cb98cbf4-5a39-458c-a0eb-b14aaa0f854b/climate_change_effects_on_human_health_and_mortality.pdf
    • https://uploads.strikinglycdn.com/files/966e4431-591f-4999-84e1-b39158a05baf/64310168060.pdf
    • https://uploads.strikinglycdn.com/files/71dc2f15-c8ba-492a-a7a9-a45b0a596ffe/ronodafo.pdf
    • https://uploads.strikinglycdn.com/files/fed6975d-3ebe-49f3-815c-d45467b1e9a5/femomujegexik.pdf
    • https://uploads.strikinglycdn.com/files/138f4216-b82d-4ab2-a31f-355bed57e050/lapapana.pdf
    • https://uploads.strikinglycdn.com/files/f86c3b08-528a-4b7a-985e-9c6829154c3b/85840694218.pdf
    • http://rilijoxedu.rf.gd/wazuwutaboman.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea06.bin
9d5d4c17e4ccc846551d0672f3248d9775d5e241d3a2e7e49455a25743014eb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA06 5168 bytes
font_01_sfnt_off0000fbb7.bin
4a1de5e7469bdf67eca187e99d7342a60277cd38ef106ec6e72dea408cade5f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB7 10596 bytes

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