Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce1e8e6c0b100f5b…

MALICIOUS

PDF

79.0 KB Created: 2021-05-10 01:06:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1c7a9cbdff491f7bceed8697546ff3d9 SHA-1: 8cdaa69fb83a05cccce3cd5c012cb7d437423822 SHA-256: ce1e8e6c0b100f5be89ad0d2a4068793b767dcf5896b78a08dc15fe99efde317
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9882

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://ponafet.ru/strik?utm_term=wagner+power+steamer+model+705+instructions PDF link annotation
    • https://livadasim.weebly.com/uploads/1/3/4/3/134312527/pelifidagub-kusojesodoka-pakasosilogexut-xibirev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404297/normal_602054259f6aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454822/normal_604833f1c1bb6.pdfIn PDF document text
    • http://pogetukexuk.66ghz.com/nezesabesoroxuvikebaz.pdfIn PDF document text
    • http://manekobe.22web.org/tepusiririmafogan.pdfIn PDF document text
    • https://wovufimi.weebly.com/uploads/1/3/5/3/135327312/4558916.pdfIn PDF document text
    • https://luwupedo.weebly.com/uploads/1/3/1/3/131383743/junipurepopej.pdfIn PDF document text
    • https://refedekejevejat.weebly.com/uploads/1/3/4/3/134312363/9412078.pdfIn PDF document text
    • http://gizapiretade.iblogger.org/68559922441.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447465/normal_6066cd578be71.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384628/normal_5ffcf92b6bc69.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/04625994-6fc0-432c-a033-1675d4410063/research_methods_for_the_behavioral_sciences_3rd_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfe52d4e-7dac-484b-aeed-4ed633971e45/21038114728.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcd26246-d7ca-4cd0-af7e-bd18e274f655/67135327863.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dee7fac-c43c-4e3a-9112-645d8d090081/dowopixaroj.pdfIn PDF document text
    • http://zerinamud.rf.gd/2109726693.pdfIn PDF document text
    • http://rokevibe.epizy.com/how_to_connect_water_line_for_ice_maker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c193708-44e0-4f64-8835-6c7fe31f9915/2001_chevy_1500_radio_wiring_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dcf25f0-949c-4ddf-8450-70d6892c8b14/93077207762.pdfIn PDF document text
    • http://wuvadik.rf.gd/tuwopezajefux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9859038-cb0c-47b5-acc7-fe5e70de5cce/28366982084.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04eeea5e-aeb4-43f1-88dd-ca500573a20e/jejibisedoxamafenaripex.pdfIn PDF document text
    • http://resifidivef.epizy.com/salary_of_machine_learning_engineer_in_germany.pdfIn 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_off0000fda5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA5 5844 bytes
SHA-256: 2cb5508aa833a6875253e5151d2f13bebfe422847d8180404aa76ed0378f9186
font_01_sfnt_off00011199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11199 11120 bytes
SHA-256: 505d0894f78f22dfb218352fa0659b6ff5fa6982b01db52595919f3daafaf835

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