Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a9b3133c92cd4c5…

MALICIOUS

PDF

80.7 KB Created: 2021-02-27 16:30:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 7685815208ff38e5e7b6fe4f3c7b7776 SHA-1: b3967252d665db094f1c4070c25963d2d02cec99 SHA-256: 5a9b3133c92cd4c5c23394f5f4856c60adc1c145174e2b125869926c37be9a81
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of external URIs and the link farm heuristic point towards a phishing attack designed to lure users to malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://dugedepap.ru/123?utm_term=the+exorcist+3+full+movie+youtube PDF link annotation
    • https://cdn.sqhk.co/xaleteser/hAngfgc/favapilalitavufefom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449618/normal_5fe359a7b9ab2.pdfIn PDF document text
    • https://cdn.sqhk.co/tudobele/ggC8gde/sositivubaxoxosuxutevigov.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425912/normal_5fc95eb6b08e8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388629/normal_5fc6f8e2a30cd.pdfIn PDF document text
    • https://cdn.sqhk.co/pedidagow/a7EgjeA/23831264641.pdfIn PDF document text
    • http://dipazekonowa.mypressonline.com/23693204267.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530457/normal_5ff829231a555.pdfIn PDF document text
    • http://xipelosowux.22web.org/what_is_the_format_of_writing_a_business_plan.pdfIn PDF document text
    • http://pinegobojefo.getenjoyment.net/gubiterisowegokazafeja.pdfIn PDF document text
    • http://warixedivukinat.mygamesonline.org/vefoza.pdfIn PDF document text
    • http://pinegobojefo.getenjoyment.net/how_to_load_a_bobbin_singer_stylist.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/kakef/nativescript_playground_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/28706735630.pdfIn PDF document text
    • http://fevejalamozek.epizy.com/g._p._s._c_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/hp_elitebook_folio_9470m_core_i7-3687u_2.10_14_hd.pdfIn PDF document text
    • http://tazefuwavubu.rf.gd/70222142857.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/94994303138.pdfIn PDF document text
    • http://pepebejawu.epizy.com/18653535471.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF0 5396 bytes
SHA-256: 141ac59adf73c5760d3139d1eee95c0cc581ab2e40778adcfec461b0e3294097
font_01_sfnt_off00010f37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F37 11136 bytes
SHA-256: cd4aa16a6768c734e8049fe5ac5eb8d5d01a47a057072d8315d83e59c54d06f5

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