Malicious PDF — malware analysis report

Static analysis result for SHA-256 04d1f478949c3aec…

MALICIOUS

PDF

129.6 KB Created: 2021-03-22 10:37:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: c218e48553fae6453603f4e9fb344028 SHA-1: 3c34abb0b53d0bc0c4110d124af54cfb3457f79f SHA-256: 04d1f478949c3aecb0ae0e63952ef6582d3a19fb0f3d970b54411cf9a86b1e25
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to distribute traffic or host malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution scheme, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=big+ben+radio+alarm+clock+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4384628/normal_5ff6b2442b3c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425483/normal_5ff0466650235.pdfIn PDF document text
    • http://dvestideyli.xyz/15420520486fkr65.pdfIn PDF document text
    • http://securityverifiedservices.com/robin_cormack_byzantine_art36uip.pdfIn PDF document text
    • https://marabobufazezi.weebly.com/uploads/1/3/5/9/135992859/8298495.pdfIn PDF document text
    • http://tehnopolis.org/39007386091rh4pr.pdfIn PDF document text
    • http://mishabelle.ru/ribads953z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370309/normal_5fd67c118a0a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427783/normal_6050e817b4a95.pdfIn PDF document text
    • http://calipshatngaccs1.xyz/mewipapowimodifilezovujxb4.pdfIn PDF document text
    • https://madoguwulivusi.weebly.com/uploads/1/3/0/7/130775056/mibototil.pdfIn PDF document text
    • https://vosojexurixug.weebly.com/uploads/1/3/1/0/131070535/zijulibelav.pdfIn PDF document text
    • https://vedakevuvapi.weebly.com/uploads/1/3/4/0/134013486/817687.pdfIn PDF document text
    • http://neuroncraft.online/rectangular_coordinates_worksheetavl8f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/57280478-b3cf-448f-9b04-1d62c1d495cf/jojo_season_7_anime_release_date.pdfIn PDF document text
    • https://01c19f78-c7d0-441a-b56a-8672493f87de.filesusr.com/ugd/9d66c7_98730116dbfd4f8eb455773378d978a1.pdf?index=trueIn PDF document text
    • https://50aad03f-9d2a-47e6-be13-abd12f321b17.filesusr.com/ugd/3fd638_229dc5f2ceb44d4fb2b955790b56d063.pdf?index=trueIn PDF document text
    • https://17851959-1482-4b49-8222-7b7b0c628459.filesusr.com/ugd/3cb679_e9f7e7f367914e45930487ef8fe3c845.pdf?index=trueIn PDF document text
    • https://2a4065d7-883d-43e8-a524-7ce9aa4b4e88.filesusr.com/ugd/ccb1c6_946fab1f299c4b01b664f2a534697f41.pdf?index=trueIn PDF document text
    • https://2791e1c6-719d-47aa-bdc5-1556df251b63.filesusr.com/ugd/7757c5_326dfc47b7ab42dc954b0f1ad45cc61b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7866f37b-40fd-4f5c-8413-4b754a5e4856/89156357661.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0001d5e1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1D5E1 20204 bytes
SHA-256: f660a1dbb780f7613f6fdd6f398ef67786c46798c0cfea97dc1bd277ec112e8c
font_00_sfnt_off00018a8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A8A 3136 bytes
SHA-256: b82ffe763c05cbd590d5060c903e71e692cf6d74c561cd6e3142290239910851
font_01_sfnt_off000195ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x195AE 5332 bytes
SHA-256: 57457ddce8164f5ba75d721e4f08619a699fc6424c0411bc5dd495dd828b3cbc
font_02_sfnt_off0001a7bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A7BD 13848 bytes
SHA-256: b916341aa1e08132a8bc955c6e814fa658595168b08bf15f712980c54774ad29

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