Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5cf79f26925d39a…

MALICIOUS

PDF

88.3 KB Created: 2021-03-20 19:52:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 80885b7f9939d82d14469e21ce1d2409 SHA-1: e7b824fcf72574483623b9644e0577a7a1d54514 SHA-256: f5cf79f26925d39a50d22ebb1a80f01c5d987819590a57a65d1e3598c616acd6
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a malicious document designed to redirect users to potentially harmful sites.

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://leonvi.ru/wix?keyword=bushnell+sport+850+manual PDF link annotation
    • https://siputewebototab.weebly.com/uploads/1/3/4/4/134480832/demegatizi.pdfIn PDF document text
    • https://mazanotofubemiz.weebly.com/uploads/1/3/2/6/132681192/fidufukel-sowuzujikuta.pdfIn PDF document text
    • https://tapizijivuvol.weebly.com/uploads/1/3/2/6/132696465/liwusem.pdfIn PDF document text
    • https://lugexobamav.weebly.com/uploads/1/3/5/9/135965248/24eb6ce308d346.pdfIn PDF document text
    • https://gorofegi.weebly.com/uploads/1/3/4/4/134462705/litajelin.pdfIn PDF document text
    • https://sudororurupe.weebly.com/uploads/1/3/4/6/134602833/1398111.pdfIn PDF document text
    • https://kaxaxelakag.weebly.com/uploads/1/3/4/2/134235500/jefukefodufimosap.pdfIn PDF document text
    • https://padawevuwelidas.weebly.com/uploads/1/3/1/4/131438111/naxowu.pdfIn PDF document text
    • https://sabitafev.weebly.com/uploads/1/3/4/3/134308069/7024510.pdfIn PDF document text
    • https://domafotenok.weebly.com/uploads/1/3/5/9/135973376/ronazama.pdfIn PDF document text
    • https://nibevomixosu.weebly.com/uploads/1/3/4/1/134108547/gotetifenegof.pdfIn PDF document text
    • https://talotemeve.weebly.com/uploads/1/3/1/6/131606578/404658.pdfIn PDF document text
    • https://xumebarukez.weebly.com/uploads/1/3/4/6/134687090/3404864.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/nuvukivaxiren/sapna_choudhary_video_song_gane.pdfIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/porsche_911_carrera_performance_figures.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/34521886201.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/ludemutarebekiniken.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/noxasawaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6699aec-852a-4085-93fe-f9ac5403ea0b/26499380627.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/cfd_online_trader_platform.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21f0f92e-e990-4060-a1f7-40a7284d9353/how_to_open_braun_thermoscan_ear_thermometer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7912883-a285-4bc3-a580-996439ef7e7b/behringer_eurorack_ub2442fx-pro_power_supply.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_off00011364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11364 5568 bytes
SHA-256: a0557e043aa76f22d744f5a652ebc5b830ae33b00a2e1a97acaec352a7bf8609
font_01_sfnt_off00012627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12627 16588 bytes
SHA-256: 262abe3560c4ae0bd0072feefb70965de5a3f316b2649f6ed4674dc0453cdacb

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