Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c939518f783a3f6…

MALICIOUS

PDF

92.5 KB Created: 2021-04-04 17:51:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 9a4d19e7fcc35162f91bd082389693a3 SHA-1: 49d69f3efb88a93e54f3813f40e28faf9408f38e SHA-256: 3c939518f783a3f65f28e700b508f441c5df1a32ad07eee707ccb8207f8173b1
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains a large number of external links, many pointing to disposable hosting, suggesting it functions as a link farm. One prominent URL, 'https://lozipotod.ru/strik?utm_term=roland+octapad+spd+30+kit+list', is likely part of the lure or a redirection mechanism. The document body is heavily obfuscated and appears to contain metadata rather than user-facing content, further supporting a non-legitimate purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 6

  • 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.
  • 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/strik?utm_term=roland+octapad+spd+30+kit+list PDF link annotation
    • https://povijovo.weebly.com/uploads/1/3/4/4/134463476/xudamikeka-lapafa-mixutidutexa-jubuwinatijeg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482882/normal_5fe0f4dac6935.pdfIn PDF document text
    • http://yewes.space/76813202684p4vyg.pdfIn PDF document text
    • http://shop-profildoors.ru/did_love_chunibyo__other_delusions_endkth1e.pdfIn PDF document text
    • https://bokixewabukogu.weebly.com/uploads/1/3/4/3/134341992/xekevix-rubadudezof-wusivodawoxemi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368218/normal_5fe98c724bf2d.pdfIn PDF document text
    • https://tafubevodila.weebly.com/uploads/1/3/4/0/134016741/65c6e.pdfIn PDF document text
    • http://gratoraama.website/theme._appcompat._light._darkactionbar_not_found_androidx3li0y.pdfIn PDF document text
    • http://jushq.club/94577233822vkohu.pdfIn PDF document text
    • http://watertea.space/87858477448yyue9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456676/normal_60490b809c4a1.pdfIn PDF document text
    • https://vumerajijo.weebly.com/uploads/1/3/2/8/132815742/nobara.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417808/normal_6037c21b16a69.pdfIn PDF document text
    • https://zinorenote.weebly.com/uploads/1/3/5/3/135349773/fokulik.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499622/normal_5ff69f6dec978.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366350/normal_5feb88ce490d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372086/normal_6026956b9dc87.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://724418e0-3ace-43c1-abd8-628b4820fc71.filesusr.com/ugd/6df952_dbf69674f11d45aea6dae2b5f60213bf.pdf?index=trueIn PDF document text
    • https://c788b29d-df2d-4d46-9946-349e8cce89b7.filesusr.com/ugd/a9e086_10122126391d4ba7a425a842af99b167.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/niporofez/sas_ods_change_orientation.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/24779152123.pdfIn PDF document text
    • https://36425c1f-c329-48aa-845d-1f8252cb45c8.filesusr.com/ugd/01d500_2a7d2e8546bb473b977d3995fbc523c7.pdf?index=trueIn PDF document text
    • https://488c2ff9-9ff4-499e-8f11-525115e20b22.filesusr.com/ugd/8aba0c_2cc2b1a0e9374a2fb83eb12260266b49.pdf?index=trueIn PDF document text
    • https://f92484db-e5b4-41f8-9431-508412042773.filesusr.com/ugd/b04c15_0a2e7d3b74ae454dace6696d4f4fc997.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/american_history_textbook_college.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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B9 5020 bytes
SHA-256: 13a98b894be87bcc71193e19457c7f79896de0dd4c5bff4ee371794ceb6f86cd
font_01_sfnt_off000117d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117D0 11876 bytes
SHA-256: f3cb7f7a6af0462a754cedcf61dfbe792be59e2dc7eb8fbeee9c2bf772870954
font_02_sfnt_off00013fbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FBC 16060 bytes
SHA-256: 5b0d2701ab39d2f69c66d7d16c60d8db0b323aa0832947137e757b5401d27330
font_03_sfnt_off00015454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15454 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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