Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd7689946a1d7b6d…

MALICIOUS

PDF

42.2 KB Created: 2021-05-22 01:06:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 81ddfcb2755c4e34172e9fc0f498b094 SHA-1: c108a382c10c6919f2be9d6ed004f3ac629da145 SHA-256: fd7689946a1d7b6d5d6665538f0bf978a7cc2bc10120afbe6b80fa46f1443342
262 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed as a phishing lure, presenting itself as an invoice or ticket confirmation. It contains numerous links, including a critical malicious redirector link to 'yafferge.ru', which likely leads to further malicious content. The document's structure and the presence of many external links suggest it's part of a link farm operation aimed at distributing malware or conducting phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7383

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 42 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • 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://yafferge.ru/strik?utm_term=facturar+ticket+autopista+la+venta+chamapa In PDF document text
    • https://cdn-cms.f-static.net/uploads/4390643/normal_6025a73f9805e.pdfIn PDF document text
    • https://sezifiloxoxo.weebly.com/uploads/1/3/5/3/135348424/mubafagisu_todediv_nezapomomofux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416139/normal_6061963656a54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410674/normal_6067cbb4e8c39.pdfIn PDF document text
    • https://jowidirususonin.weebly.com/uploads/1/3/0/7/130775515/zokubuzuxok.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366359/normal_600635d1b8dda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402000/normal_602129bf23f62.pdfIn PDF document text
    • https://pupotebomur.weebly.com/uploads/1/3/4/7/134707076/5230187.pdfIn PDF document text
    • https://kikipaniwuno.weebly.com/uploads/1/3/4/7/134714830/7052409.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366055/normal_600fa69d05171.pdfIn PDF document text
    • https://mulibini.weebly.com/uploads/1/3/4/8/134881685/zebofesu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460975/normal_601c5bacc9725.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462075/normal_60516ad5f0734.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499005/normal_6055a9bf4f995.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476952/normal_60381e9025ed8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387430/normal_6013817b00418.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373297/normal_6004e07be0be5.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/new_bollywood_movies_2019_full_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/babinifiponikoj.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/netezuw.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/53935918924.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/igloo_ice_maker_light_blinking_green.pdfIn PDF document text

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