Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cb17d17a4b5db55…

MALICIOUS

PDF

79.7 KB Created: 2021-05-30 21:13:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c782de1d537cd8ae3bc20f6bd380a506 SHA-1: c845872a42084c2343d94f1a60a1a19063082eaf SHA-256: 5cb17d17a4b5db557c05c226ffde26d8e1c44d134cc01a4c029734143b35a719
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and link farm heuristic suggest it's designed to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dugedepap.ru/123?utm_term=decorative+paper+box+templates PDF link annotation
    • https://fizijoju.weebly.com/uploads/1/3/0/8/130814030/zaloxejok.pdfIn PDF document text
    • https://tirevenisigagum.weebly.com/uploads/1/3/4/5/134500803/1227895.pdfIn PDF document text
    • https://fokorakadugapo.weebly.com/uploads/1/3/4/4/134444193/liwomijejesijebanaj.pdfIn PDF document text
    • https://dekoreriso.weebly.com/uploads/1/3/7/5/137501726/91b71.pdfIn PDF document text
    • https://guromofir.weebly.com/uploads/1/3/4/4/134489627/vorulusawo_norog_filifer.pdfIn PDF document text
    • https://vimumigejanamim.weebly.com/uploads/1/3/4/6/134619591/beliwaviwelo_vukitepa.pdfIn PDF document text
    • https://guvoxokogavi.weebly.com/uploads/1/3/4/3/134374443/gomilibag.pdfIn PDF document text
    • https://kesegupopu.weebly.com/uploads/1/3/4/1/134131766/281b294b3b2de.pdfIn PDF document text
    • https://zitofizifejiza.weebly.com/uploads/1/3/4/7/134706741/a6a29d512.pdfIn PDF document text
    • https://wuwonemuv.weebly.com/uploads/1/3/4/5/134589345/1501882.pdfIn PDF document text
    • https://lemevepavakupe.weebly.com/uploads/1/3/4/7/134701524/bb7f731b04ad.pdfIn PDF document text
    • https://daletapobuwero.weebly.com/uploads/1/3/4/6/134666872/lusiwakaw.pdfIn PDF document text
    • https://juwarojolajekol.weebly.com/uploads/1/3/4/1/134108785/4bd1b7047.pdfIn PDF document text
    • https://fupigipefixoxom.weebly.com/uploads/1/3/1/3/131379213/5775715.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/304c35b5-b7b8-44d9-b185-663237eb6c0a/67159819556.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68be8864-cca3-4a25-ac10-bf54ac572b8b/logic_pro_x_for_dummies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be8ba6c6-d6e6-4f2c-a720-3b1f0c1db46f/88796149953.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18c214f1-7fcf-4a09-a779-82f21ef4365c/rudolph_the_red_nosed_reindeer_trap_remix_mp3_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d6a60a8-e4d6-4227-82fb-5f1840ce1666/garmin_vivofit_jr_2_strap_nz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a48f29e1-3e2f-455c-b36d-aeeb734f35cf/the_brush_stopped_spinning_on_my_dyson.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_off0000fa71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA71 5348 bytes
SHA-256: 100e225cffbd731352e2b1993f663add455802a0e53977368ccd1fadadaa221c
font_01_sfnt_off00010c91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C91 10304 bytes
SHA-256: 6d70dab8c98a2b47ae8bc33ee7c9c25b95cf36a5b1eab5d2350f54d184ec1be7