Malicious PDF — malware analysis report

Static analysis result for SHA-256 41ce67b4748c9c55…

MALICIOUS

PDF

67.7 KB Created: 2021-06-06 17:25:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 33b21fe09873486ad377c0b6a41bc878 SHA-1: e9f03c5c043cca03bcc86d844a07e3b486e9fe67 SHA-256: 41ce67b4748c9c5508ce5071cd2d3b8254972903ab140479558ef35368b2e5ed
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm designed to distribute malicious content or phish users. The document's content, disguised as a guide for installing 'game guardian', is a lure to encourage clicks on these malicious URLs. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8222

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.
  • 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
  • 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://drafthe.ru/pbw?utm_term=how+to+install+game+guardian+no+root+2019 PDF link annotation
    • https://rogapasutidubu.weebly.com/uploads/1/3/1/4/131438129/rubizibejelamis.pdfIn PDF document text
    • https://sidopaxabu.weebly.com/uploads/1/3/1/3/131398246/kovogisopa-xetozaluluzuje-nidika-jubasa.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/1b989777-357c-457b-8ff2-f8376736374d/3510535529.pdfIn PDF document text
    • http://kuperuxowix.pbworks.com/f/o_que__uma_arte_rupestre.pdfIn PDF document text
    • http://gemometis.pbworks.com/f/53425677703.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57cc3e09-9983-47e7-ae31-68185261359c/92242413084.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/329d687e-b5fc-40e4-82bb-98cd790276ca/how_to_reset_roomba_960_map.pdfIn PDF document text
    • http://zuvevetub.pbworks.com/f/chucks_dcs_guides.pdfIn PDF document text
    • http://xetibubib.pbworks.com/w/file/fetch/144418056/zotetuxomozabonim.pdfIn PDF document text
    • http://fulusivijomu.pbworks.com/f/81727681591.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37aa2a6b-390b-4f9a-aaa3-bf0b52efbf3d/sullair_compressor_oil_cross_reference.pdfIn PDF document text
    • http://lugozamuxika.pbworks.com/w/file/fetch/144418173/yds_publishing_deneme.pdfIn PDF document text
    • http://xorunezagu.pbworks.com/f/respuestas_de_examen_de_6_grado_2_bimestre.pdfIn PDF document text
    • http://gurilotav.pbworks.com/w/file/fetch/144668304/dan_lok_book_recommendations.pdfIn PDF document text
    • http://lekipirunezi.pbworks.com/w/file/fetch/144415863/59019903479.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d06fc4b0-12a9-466a-b425-1daed382fa82/canoscan_lide_25_software_for_windows_10_free_download.pdfIn PDF document text
    • http://kufugaref.pbworks.com/f/81303881325.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea03c8f2-8405-41ea-bc34-a79e4fbc5f17/how_do_i_cancel_my_dish_service.pdfIn PDF document text
    • http://xodelow.pbworks.com/w/file/fetch/144576582/72760245759.pdfIn PDF document text
    • http://tusoxefum.pbworks.com/f/pekikazukuzenona.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/771d4a1a-b229-45f4-b2cd-0b97a3d50422/42840996468.pdfIn 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE98 5680 bytes
SHA-256: ecbf26ff305ba60acc771a095163fa777e2095790147e9fa92341c10b16469ea

Open this report in the interactive analyzer, or submit your own file for analysis.