Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f134bd48f7f2190…

MALICIOUS

PDF

67.2 KB Created: 2021-02-26 21:35:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 921a77495fa30fbbf1f47737630acf7a SHA-1: 7f6a6b4466a4bf482e7d8c97b868dd80dc4b59bf SHA-256: 1f134bd48f7f2190e37d2279afa23a9d8fa2863f4963f2804ee916f670a1c02b
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection infrastructure. The document body, though heavily obfuscated, appears to be a lure related to resetting a gun safe code, likely to entice users to click on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/strik?utm_term=how+to+reset+cannon+gun+safe+code PDF link annotation
    • https://vukuzimina.weebly.com/uploads/1/3/4/1/134109202/medoz.pdfIn PDF document text
    • https://towavakivuno.weebly.com/uploads/1/3/5/3/135318123/230d827.pdfIn PDF document text
    • https://befutoxe.weebly.com/uploads/1/3/4/4/134443098/3535831.pdfIn PDF document text
    • http://vash-komfort5.ru/16660036862kw5xm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401692/normal_5fdc2886dd3f6.pdfIn PDF document text
    • https://mesirurot.weebly.com/uploads/1/3/4/7/134706751/3132267.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461786/normal_5febdcd280478.pdfIn PDF document text
    • https://nunipotewisi.weebly.com/uploads/1/3/4/8/134892443/1717540.pdfIn PDF document text
    • https://lusogovo.weebly.com/uploads/1/3/4/3/134358567/pewurusotosagedori.pdfIn PDF document text
    • http://bioforce-co.site/mivasenisalolamkfkry.pdfIn PDF document text
    • https://vubinejenifa.weebly.com/uploads/1/3/4/4/134444695/zodajebujanifepot.pdfIn PDF document text
    • https://taleputara.weebly.com/uploads/1/3/4/3/134305900/zorabosepefuxaxajodu.pdfIn PDF document text
    • https://gomosonu.weebly.com/uploads/1/3/2/7/132712120/9524794.pdfIn PDF document text
    • http://meinekarten.best/15969647973cc3p8.pdfIn PDF document text
    • https://lideteli.weebly.com/uploads/1/3/0/7/130775407/xerojejotabugosubes.pdfIn PDF document text
    • https://pegigisujojefuf.weebly.com/uploads/1/3/1/4/131413718/ludam.pdfIn PDF document text
    • http://kupivse.xyz/apc_smart_ups_3000_xl_manualutgy3.pdfIn PDF document text
    • https://lebabipiw.weebly.com/uploads/1/3/0/9/130968925/fubekomomomapodad.pdfIn PDF document text
    • https://fivarebaxuru.weebly.com/uploads/1/3/5/3/135326201/zigebizites.pdfIn PDF document text
    • http://espaceabonnes.com/kusarewamokltl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418185/normal_60241176609b4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000cc28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC28 5212 bytes
SHA-256: 9a92c98339ef2e2c840d3e6503fc8de9b46a0fec097e77434abb487595af4853
font_01_sfnt_off0000de04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE04 9872 bytes
SHA-256: f71c29b6a00c5a7a8cf5d33d5bce7597d5e650902d3433c2dab06e5532b86eb9