Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5d90e942e27a0a5…

MALICIOUS

PDF

50.6 KB Created: 2021-01-22 23:41:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 36e69d85cf65f833196e8ac1ff9a11c6 SHA-1: 1b53356dca306aeaea0bdc6dbec19510b4a30680 SHA-256: f5d90e942e27a0a584ace62b5b6631ea4fce49d437405def6d5c8c2b18376466
64 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs pointing to disposable domains, characteristic of a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' confirms this behavior, indicating a likely attempt to manipulate search engine results or redirect users to potentially malicious sites. The ML classifier also flagged the PDF as malicious, supporting this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8743

Heuristics 3

  • 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://leonvi.ru/aws?utm_term=chunari+chunari+ka+photo PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374196/normal_5fe8ef322a3cf.pdfIn PDF document text
    • https://zofudugopevemob.weebly.com/uploads/1/3/1/6/131607066/1234296.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383302/normal_6007362c81ea5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468871/normal_5ffa091fc1602.pdfIn PDF document text
    • http://getegenufiduso.66ghz.com/17283139959.pdfIn PDF document text
    • https://site-1253349.mozfiles.com/files/1253349/burer.pdfIn PDF document text
    • https://garasomebopite.weebly.com/uploads/1/3/0/7/130775476/6707928.pdfIn PDF document text
    • https://site-1192787.mozfiles.com/files/1192787/72091377082.pdfIn PDF document text
    • https://golasirase.weebly.com/uploads/1/3/1/3/131384643/5235719.pdfIn PDF document text
    • https://site-1172455.mozfiles.com/files/1172455/noturonujesexitit.pdfIn PDF document text
    • https://site-1171487.mozfiles.com/files/1171487/zobaluzu.pdfIn PDF document text
    • http://bufaturofonoko.22web.org/giruvivevivuvun.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366365/normal_5fe30a6189dd8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375339/normal_5fe2bcf11d850.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://miviguwi.epizy.com/causes_of_excessive_gas_formation_in_abdomen.pdfIn PDF document text
    • http://nawonuzegajosi.epizy.com/21083243848.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/ramafuned.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA59 4780 bytes
SHA-256: c12eadf0405907050d13896c2ed0f91bad722d480e585f88270c808b3555dbf6

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