Malicious PDF — malware analysis report

Static analysis result for SHA-256 199c1c18018eb145…

MALICIOUS

PDF

83.2 KB Created: 2021-04-17 04:14:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 79fdc7dd8cc27ff0f575823b8be3ada2 SHA-1: c463371b73379b3a5115f5e17a8383b1113594ae SHA-256: 199c1c18018eb145ddd9f2fe1acb65ab7652eef986b7feac32b3e7cd6a7551f0
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one pointing to a suspicious domain ('resalured.ru') and another acting as a link farm. The document body, though heavily obfuscated, suggests a product lure, likely intended to trick users into clicking malicious links. No scripts were extracted, but the PDF structure and embedded URLs are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://resalured.ru/strik?utm_term=jam+thrill+duo+bluetooth+speaker PDF link annotation
    • https://cdn.sqhk.co/letaziseb/fjhdhhA/room_share_apartments_in_olympia_and_lacey_washington.pdfIn PDF document text
    • http://opensalon.xyz/download_sound_drivers_for_windows_10_acerogqy1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375704/normal_601ab0384dbea.pdfIn PDF document text
    • https://cdn.sqhk.co/fezusife/TXvgfjg/bojudexetofu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368479/normal_606c5b87efdaf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390643/normal_5fc9dd050562d.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwutiro/ysiighW/bathukamma_dj_songs_2017.pdfIn PDF document text
    • http://thrivewebs.com/bekodulukuzodoais2.pdfIn PDF document text
    • https://cdn.sqhk.co/ridasozewe/DoZmoha/infection_rate_uk_graph.pdfIn PDF document text
    • http://laxogapajoze.getenjoyment.net/hebrew_alphabet_download.pdfIn PDF document text
    • http://dabukim.mygamesonline.org/samsung_un65ju6500f_specs.pdfIn PDF document text
    • http://perfectiona.online/kedajusafapiwuvemajevbagqx.pdfIn PDF document text
    • https://vigoxanumevu.weebly.com/uploads/1/3/4/4/134466257/rolulixa_kudefawaf_pexezifem_nokawodofuzet.pdfIn PDF document text
    • https://botekajerojaj.weebly.com/uploads/1/3/4/7/134749353/33dd0aab61.pdfIn PDF document text
    • https://cdn.sqhk.co/fujotojaxob/enjba4y/9577011609.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kifesafijupesob.onlinewebshop.net/79366828482.pdfIn PDF document text
    • https://8eeb1f0a-0cdd-4c66-98a4-83777b49fb54.filesusr.com/ugd/64f9d2_c43f4d8feb824bb5ad123f4eb5138a93.pdf?index=trueIn PDF document text
    • https://a0bbd489-bf03-48a0-8e93-88abd0751e5b.filesusr.com/ugd/370ea2_0b7c57cbb5764c87b16272f4fe091cb7.pdf?index=trueIn PDF document text
    • https://cb2d4818-2134-4ea5-ae57-1bc45cfc4292.filesusr.com/ugd/7e787c_ff2e9432dfe7468da980183b36d824c2.pdf?index=trueIn PDF document text
    • http://dozopedatofol.atwebpages.com/mavufasezuz.pdfIn PDF document text
    • https://a72b158e-cead-41d6-a0b3-8518216316a4.filesusr.com/ugd/35c6e2_fca415fbee2440a4b68fc5ddd5092228.pdf?index=trueIn PDF document text
    • https://2080fafa-2491-4ac3-8118-a138f33bff34.filesusr.com/ugd/822ecd_25563a92c8db44878ef8e7419ac75773.pdf?index=trueIn 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_off000107d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D4 5392 bytes
SHA-256: 2c4da67087a837fc4938bc0c96cdedd7e9dad1eab63afaf23026ef90b460399b
font_01_sfnt_off000119f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F0 10896 bytes
SHA-256: 3416f8e7d4d8c20f2f3c38c05705e6b6eabbb933cb29cd6f9ed81947b1a3a6b5

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