Malicious PDF — malware analysis report

Static analysis result for SHA-256 26e52fea0ac18115…

MALICIOUS

PDF

94.7 KB Created: 2021-03-20 04:47:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 122c16ed0c54477e000721c06b56e4e9 SHA-1: 8136cbc182c1dc2d8c13e2f67c9b4a8138977a61 SHA-256: 26e52fea0ac18115bf3505071fa9dc7457fb0c7a03fc020ef0741c746604c6d6
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a spearphishing attachment used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7358

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://jumiwimov.ru/strik?utm_term=worldwide+cost+of+living+report+2018+pdf PDF link annotation
    • http://welitizenowem.mywebcommunity.org/21406722506.pdfIn PDF document text
    • http://tersq.space/99433851553wd4m5.pdfIn PDF document text
    • http://7lessons.website/subordinate_conjunction_song5rsx6.pdfIn PDF document text
    • https://vebafuxitupum.weebly.com/uploads/1/3/4/8/134890404/dojawikuk.pdfIn PDF document text
    • http://kuzexamipapoxip.medianewsonline.com/42860459625.pdfIn PDF document text
    • https://luwomobesu.weebly.com/uploads/1/3/4/2/134235002/1376999.pdfIn PDF document text
    • https://vuxutuwatojo.weebly.com/uploads/1/3/4/6/134625262/guremimoni.pdfIn PDF document text
    • http://frukt.space/vofuraxanifijospn19.pdfIn PDF document text
    • http://giocodigital.space/xexenokafuredivobapolebofthpf7.pdfIn PDF document text
    • https://digexuvin.weebly.com/uploads/1/3/2/8/132814990/petedakimewu-sigew-semasirebide-futetapobotuba.pdfIn PDF document text
    • http://bitalotava.scienceontheweb.net/bestanden_verkleinen.pdfIn PDF document text
    • http://espaceabonne.com/fortresscraft_evolved_dedicated_server_guider30sv.pdfIn PDF document text
    • http://picsonair.com/24393336174mzu6l.pdfIn PDF document text
    • http://italdom.fun/android_set_selector_color_programmaticallycnvjh.pdfIn PDF document text
    • http://zabolojisag.getenjoyment.net/mahatma_gandhi_biography_english.pdfIn PDF document text
    • http://save50.pro/34578267121t8vvn.pdfIn PDF document text
    • http://faceit.su/5431383091ox1o0.pdfIn PDF document text
    • https://jowidirususonin.weebly.com/uploads/1/3/0/7/130775515/vilujobonidovixuso.pdfIn PDF document text
    • http://soldonlakewood.com/59003819023pp9r9.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/jalasilunaz/vashawn_mitchell_nobody_greater_mp4.pdfIn PDF document text
    • http://rugoxesoteko.myartsonline.com/48875736370.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/suwubedunewaru.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_off00015800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15800 5800 bytes
SHA-256: a4f5a75907d7c0aaeed1de376484f73fb70b62be50554706016489bad7b39f83

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