Malicious PDF — malware analysis report

Static analysis result for SHA-256 86c9884cb3ebcfd9…

MALICIOUS

PDF

79.2 KB Created: 2021-03-13 23:42:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 40a7c046c37154e9dfed351e8d942b8b SHA-1: 4920ff4413fdd9cc3e3ab9748ae1fe237bde1836 SHA-256: 86c9884cb3ebcfd975a923a0a84ca323042f6913d713aaa9ef66fb062aaeb1ce
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to PDF files, suggesting a link farm or phishing attempt. The primary URL, 'https://dugedepap.ru/123?utm_term=bpsc+apply+online+form', is likely a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://dugedepap.ru/123?utm_term=bpsc+apply+online+form PDF link annotation
    • http://vixegoxufareka.getenjoyment.net/giancoli_physics_for_scientists_and_engineers_3rd_edition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367300/normal_604497f983d6a.pdfIn PDF document text
    • http://bipowilago.mywebcommunity.org/how_to_renew_my_mississippi_drivers_license.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408596/normal_5ff687d83775b.pdfIn PDF document text
    • http://dazenad.iblogger.org/dejar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wixanarer/9739633124.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5bc17d8-070f-4ec8-a438-b0d3dd4a6ad6/vojana.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/reloading_bench_for_sale_canada.pdfIn PDF document text
    • http://fizopifiluja.epizy.com/lupakugesopedofiv.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/89368013505.pdfIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/vozapanurevasunewurevomi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a3e4358-86c9-4fe0-8897-a82bd9b22896/81776116926.pdfIn PDF document text
    • http://lojosikol.epizy.com/latex_article_template_for_rsc_journals.pdfIn PDF document text
    • http://ludugatitabi.atwebpages.com/charlas_de_seguridad_novedosas_2020.pdfIn PDF document text
    • http://bezopiwuzalobit.rf.gd/23704122740.pdfIn PDF document text
    • https://089130c0-62ae-4bf1-a93c-656440fe8451.filesusr.com/ugd/738632_1f04da4b30214514a037a2d0aa2fe54c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/02a64aba-90ac-4113-9135-6c3a60f946bd/mens_strength_training_program_for_weight_loss.pdfIn PDF document text
    • https://cae2aa39-5014-47ec-b549-0fed73f36d02.filesusr.com/ugd/c8683e_44a2589cfb5d4ac3ae621222517fe912.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/87e953fb-5e38-4d71-9e97-823efcd7eeff/30023508628.pdfIn PDF document text
    • http://mivuzovi.epizy.com/what_do_you_write_in_a_self_appraisal_form.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/wigerivuwanujepevuboj.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_off0000f844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF844 5312 bytes
SHA-256: 7184599491999f32ef92bc6e86c9b0301288565a82f0c08058c9fca9f942041f
font_01_sfnt_off00010a4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A4E 10796 bytes
SHA-256: 691306abdd22cf8ba7a615de905e9f426fc7f6c2d667b8f76c6cfc842406b4e0

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