Malicious PDF — malware analysis report

Static analysis result for SHA-256 5de5ea6e0e5dad53…

MALICIOUS

PDF

71.4 KB Created: 2021-03-27 16:40:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d657be688adf24a9027fe5f5a70d8b62 SHA-1: 7f50b27fb2dcf5baa11e9bb7a797adf42119edd6 SHA-256: 5de5ea6e0e5dad53e745a4e29505f89f497d0763bab9c0e8b8b56449a98c6918
126 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous embedded URLs, many pointing to disposable hosting or potentially malicious domains, suggesting an attempt to redirect users to phishing sites or download further malware. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a deliberate effort to create a link farm on disposable hosting, reinforcing the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/123?utm_term=lagu+bertaruh+rindu+om+adella
    • http://www19216801.site/555993441952sbnx.pdf
    • https://korisupugi.weebly.com/uploads/1/3/5/3/135308649/jekezolep.pdf
    • https://wabelurotetef.weebly.com/uploads/1/3/4/6/134693048/51f728f81602.pdf
    • http://usmileofficial.site/grammar_activities_for_college_students9mvke.pdf
    • https://webuwexuzebonal.weebly.com/uploads/1/3/0/7/130775053/fukugokekes-rajepugawefup.pdf
    • http://avtovishki-msk.ru/ponusiwolefofefeze2g.pdf
    • http://naturagrush.space/25581076013430qy.pdf
    • https://gezeteweni.weebly.com/uploads/1/3/4/0/134040803/foxinejixoxiv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://e1eccfe9-8888-4f52-a155-e9c8e84e0752.filesusr.com/ugd/4fb05f_02e9b12cb8a24d9489362c9e4dc730a3.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e8b2ca53-4650-4568-bbe1-830f71a4ecc4/how_to_use_dyson_ball_on_carpet.pdf
    • https://e1ca4115-fb55-43f9-84f1-eaf814f8c83f.filesusr.com/ugd/18122d_6b7be1be9e964767b3db7b5e6e24cd90.pdf?index=true
    • http://pokezuturev.rf.gd/sadesinu.pdf
    • https://ed4d48c2-14ea-47f5-a89a-b82193587323.filesusr.com/ugd/8ce377_d04e8827632b4ba4817e59b26bb44419.pdf?index=true
    • http://dereduvate.epizy.com/jofilapoxosamoluzovu.pdf
    • https://s3.amazonaws.com/tubukeganuji/excel_vba_range.find_exact_match.pdf
    • https://uploads.strikinglycdn.com/files/4f6acff5-2cce-4c21-8772-03a5f4de5776/calories_in_old_school_bagel_cafe.pdf
    • https://s3.amazonaws.com/bezorito/758010762.pdf
    • http://tesoravibeje.epizy.com/nuwamif.pdf
    • https://uploads.strikinglycdn.com/files/36fdf987-3b49-48ab-bace-1ad24ac2b552/binogiduwosimetovumux.pdf
    • http://zegozugigasanuz.epizy.com/towavebaduradobizixamu.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_off0000d9d4.bin
496b922178ecc8c346036bfabfaf4a55d92b44c7fe775f7521602de40f76731b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D4 5144 bytes
font_01_sfnt_off0000eb25.bin
655e60f2a43c456676daaec474dcc5b7a93fc12c864075fa9be4a4b60b6cc42b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB25 10404 bytes

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