Malicious PDF — malware analysis report

Static analysis result for SHA-256 22b490482abd54b5…

MALICIOUS

PDF

88.9 KB Created: 2021-04-20 17:39:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: b142a5f4ac54824b86ede84cb2275434 SHA-1: 1f09ec8546a75995256ca183ac6d5b6122076cb5 SHA-256: 22b490482abd54b57015f0872e6729678bbc81f5c472e85f00c2d5c8ddb30916
186 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, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the link farm suggest the document is designed to redirect users to malicious sites, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=best+mechs+into+the+breach PDF link annotation
    • https://lataladegizozav.weebly.com/uploads/1/3/4/6/134685495/bagawiwolojoku_xafeget.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412151/normal_6004f855f0c7d.pdfIn PDF document text
    • https://wupifikuzokure.weebly.com/uploads/1/3/4/5/134529023/satawoparakof-futib-papitul-zotulepilo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369498/normal_605f7fc14f631.pdfIn PDF document text
    • http://dizurexemubegog.mygamesonline.org/84388067398.pdfIn PDF document text
    • https://faloxumotib.weebly.com/uploads/1/3/4/6/134646793/tunanimofasa-vuwin-fedew.pdfIn PDF document text
    • http://xufonewujisos.scienceontheweb.net/endophytic_fungi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420438/normal_6050b7690df73.pdfIn PDF document text
    • https://runigofotizete.weebly.com/uploads/1/3/4/4/134433234/3b074.pdfIn PDF document text
    • https://vumirexow.weebly.com/uploads/1/3/2/7/132740730/kasetixinejibob_xasafozejarubo.pdfIn PDF document text
    • http://gamowenugeg.sportsontheweb.net/59377225300.pdfIn PDF document text
    • http://bamefidev.mygamesonline.org/wewirebidijebozudixonesu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a22cca75-cc8f-459c-9eea-628147015b55.filesusr.com/ugd/2f8a36_fbbd4aa7fac24a16bce69ba329e19f73.pdf?index=trueIn PDF document text
    • https://8717ace1-8174-44a1-9f98-e7cbf9e9ed94.filesusr.com/ugd/14e3be_b9e1946161d24e0cb5cf9e6060ea050d.pdf?index=trueIn PDF document text
    • https://50aad03f-9d2a-47e6-be13-abd12f321b17.filesusr.com/ugd/3fd638_1eb1838f00064f9b9e64c2c84be27f34.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2431b1a-2b79-49cd-98b0-501bc426c319/ti-84_plus_ce_app_for_chrome_os_extension.pdfIn PDF document text
    • https://368af19b-b9be-4417-8ea7-dfc4611f9fec.filesusr.com/ugd/abd4c0_16b2709aeac6413ca50156e28cad1e8c.pdf?index=trueIn PDF document text
    • http://kizufalugomux.atwebpages.com/fezixil.pdfIn PDF document text
    • https://ddd59a73-be73-4575-bd7b-2e5900175f8b.filesusr.com/ugd/5dc0ef_4718aa676119406c85afe93ba518bc49.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0293542a-a1fc-4072-8be6-ba310624b3a4/kutigasezejise.pdfIn PDF document text
    • https://a121017b-3fb3-450c-9156-48dd71a9bf80.filesusr.com/ugd/07625c_d50b9549ff1f4285a1d6ae1bc5109c93.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/81bcc2cc-15ef-4d79-a02d-f4a844694fa2/oreck_xl_professional_air_purifier_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c557d22c-7a60-4479-a960-e81d214ffe18/the_complete_book_of_enoch_standard_english_version.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011f37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F37 5196 bytes
SHA-256: 632f0fc295715627fde873d3f666a6bc14d7d7d8ae0a2d3766612b9f74a8e4d9
font_01_sfnt_off000130b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130B4 11744 bytes
SHA-256: 0aa5ef7c49231e82aa00317f730420c7317f93b7575f73587531b230de1cef51

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