Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a595afd578e3d8a…

MALICIOUS

PDF

58.8 KB Created: 2021-02-23 08:13:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e942e833d75ace8fc097c5cfccaeabab SHA-1: 501d119cb0f627bd094cf56477265b537359c1d1 SHA-256: 6a595afd578e3d8aba62baeae9d965c6cbf0cc9445cd302f3f0555c297b1cef1
124 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs, with one specifically pointing to 'bologen.ru' and a query related to wiping a Samsung Galaxy Tab 4, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 4

  • 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 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://bologen.ru/strik?utm_term=how+to+wipe+samsung+galaxy+tab+4 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4443292/normal_5ff671c156845.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470533/normal_6016092d29dcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410006/normal_60210ef782100.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405687/normal_603462f8ecb1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418984/normal_6012f89f228a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500882/normal_60119f84e251e.pdfIn PDF document text
    • https://dedelazixuni.weebly.com/uploads/1/3/4/5/134596723/4599239.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530846/normal_5fe66d76aa972.pdfIn PDF document text
    • https://midagadin.weebly.com/uploads/1/3/1/3/131381693/2759478.pdfIn PDF document text
    • https://mazaxijav.weebly.com/uploads/1/3/4/4/134488449/goradetakujama-ravev-tuxekupexefin-mudinajupese.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xaxidos.epizy.com/kemurov.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/vanerotopuvamolejupol.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/bhutto_song_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxegu/sugafamubuzevifogiw.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/puvegazurero.pdfIn PDF document text
    • http://mogerokefo.epizy.com/how_to_connect_my_sony_tv_to_bluetooth_speaker.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_off0000da37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA37 5492 bytes
SHA-256: 3332a1fd8d0f7ddfa612e6ca5b2e216436816cf833ca777e230f56e5442b13d3