Malicious PDF — malware analysis report

Static analysis result for SHA-256 013d6bacf85e83fa…

MALICIOUS

PDF

80.6 KB Created: 2021-03-29 22:26:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: db1e95bf94e255e0abfb685efab45d29 SHA-1: d04b1c8c06d7196e1e80f6834b56185aca119ed3 SHA-256: 013d6bacf85e83fae853cea65562bbf8ea261e6babc3f426f864d2aaf3ad71f1
226 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, characteristic of SEO link farms and phishing lures. The ML classifier and ClamAV detection strongly indicate maliciousness. The document's content and structure align with advance-fee scam tactics, aiming to trick users into visiting malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://nipisod.ru/strik?utm_term=wheel+of+time+tv+series+2021 PDF link annotation
    • http://vegofejolafud.mygamesonline.org/algae_biofuel_process.pdfIn PDF document text
    • http://nikopexuvedafes.iblogger.org/wowuzuludosevoxuzokisijit.pdfIn PDF document text
    • https://gagezomelebagam.weebly.com/uploads/1/3/1/6/131606069/ad5ae49ac6e.pdfIn PDF document text
    • https://subegudikowezi.weebly.com/uploads/1/3/4/4/134476363/6636984.pdfIn PDF document text
    • https://cdn.sqhk.co/rorajakura/gZgggjh/server_remote_desktop_cal.pdfIn PDF document text
    • https://fumamefix.weebly.com/uploads/1/3/0/8/130873833/9275882.pdfIn PDF document text
    • https://cdn.sqhk.co/daposofoxig/hdY3Sk1/enerpac_p802_parts.pdfIn PDF document text
    • https://cdn.sqhk.co/pefisemise/hehdmm7/mamixinudiwufojawifiwer.pdfIn PDF document text
    • https://tovamegudisolos.weebly.com/uploads/1/3/1/4/131411857/pinunewutepizaxonava.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://709e7e89-b264-4d73-b757-064736ed86f1.filesusr.com/ugd/f523c3_62ff7a3c8e6141c4bac43dc8195558c1.pdf?index=trueIn PDF document text
    • http://wawikoduvebakap.onlinewebshop.net/9040718782.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/saxon_math_course_3_cumulative_test_answers.pdfIn PDF document text
    • http://vaxabusegaw.epizy.com/animal_planet_app.pdfIn PDF document text
    • http://kewetanetoza.atwebpages.com/5548632676.pdfIn PDF document text
    • https://b2d1eea7-aef5-47fc-962c-88b5513ecafc.filesusr.com/ugd/3a57bc_9e7825b14eec4fa2b8055efee6f2d782.pdf?index=trueIn PDF document text
    • http://wexewowi.rf.gd/15913354498.pdfIn PDF document text
    • http://vagasobewinepu.rf.gd/baixar_livro_budismo.pdfIn PDF document text
    • https://ed59cdd8-0d75-4634-8bb2-7afdb9da103e.filesusr.com/ugd/9cb112_0f326186142542babc531945bdada609.pdf?index=trueIn PDF document text
    • https://5c817321-7c0c-448b-959d-deb1da9fd788.filesusr.com/ugd/19103d_8de93c64e84e41f3bcd3fd0c254695f1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/votawawo/pikepige.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/67747426151.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/kiretuwugojololegudadora.pdfIn PDF document text
    • https://bd7a0a6f-bbfd-49cc-ba41-c3f2778102d9.filesusr.com/ugd/9ea91e_a88713f95b034a17b74d672e1b667697.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF041 4876 bytes
SHA-256: bf43657edef3d08b18340fc2a263cc4f5cd0035b006a7673736a77fe4f4494d1
font_01_sfnt_off000100ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100ED 11220 bytes
SHA-256: 9f7ca842626df69b9023135d210f84f3583c212df4eab17ae4f35c0699611093
font_02_sfnt_off00012723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12723 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378