Malicious PDF — malware analysis report

Static analysis result for SHA-256 12b61ba0dcf31aea…

MALICIOUS

PDF

76.3 KB Created: 2021-03-12 12:57:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94142ecbfbb8940947a19b86ec5bacd4 SHA-1: 8c61bddf9567b4870505c01e26b438817edcffdb SHA-256: 12b61ba0dcf31aea62c6436c032b85bec83eef2b1df7c0cde54dd32d64dd3d0b
154 Risk Score

Malware Insights

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

The PDF contains numerous external links, with the primary one pointing to a suspicious domain. Heuristics indicate a 'PDF_SEO_LINK_FARM' and 'PDF_URI', suggesting an attempt to redirect users to potentially malicious content. ClamAV also flagged it as 'Pdf.Phishing.Trojan'. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8610

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/award?keyword=soncino+babylonian+talmud+pdf
    • https://static.s123-cdn-static.com/uploads/4379471/normal_5fe22608b5379.pdf
    • https://cdn-cms.f-static.net/uploads/4449768/normal_60146feb32a7b.pdf
    • https://cdn-cms.f-static.net/uploads/4410985/normal_602317fb2c70f.pdf
    • http://lezapogogaz.iblogger.org/how_is_indian_stock_market_doing_today.pdf
    • https://cdn-cms.f-static.net/uploads/4501774/normal_60217959b5cce.pdf
    • https://cdn-cms.f-static.net/uploads/4487409/normal_5fda7fc6e5f9a.pdf
    • http://sisowim.iblogger.org/business_mathematics_notes_for_b._com_2nd_year.pdf
    • https://static.s123-cdn-static.com/uploads/4413455/normal_5fcc6289e3028.pdf
    • https://cdn-cms.f-static.net/uploads/4490523/normal_601b9a8039ca8.pdf
    • https://cdn-cms.f-static.net/uploads/4373757/normal_601d39c727dc5.pdf
    • https://cdn-cms.f-static.net/uploads/4420451/normal_603aa049d5d04.pdf
    • https://static.s123-cdn-static.com/uploads/4451350/normal_5fcd5317079b3.pdf
    • https://cdn-cms.f-static.net/uploads/4373008/normal_6035c6f032320.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d80868e2-5d34-4dda-9345-0396294a35aa.filesusr.com/ugd/f9fac6_464d78c70af7417c860567544fd67e1d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/29ea90fd-ea8d-4ee1-a13f-4a1122d81972/kerosepopovukorusuw.pdf
    • https://uploads.strikinglycdn.com/files/f0602c0a-0764-417c-aeec-50c6b5fc31af/why_are_my_jlab_earbuds_not_charging.pdf
    • https://uploads.strikinglycdn.com/files/2eb99ce8-5b04-4ff6-b4d4-cb6abf37bbf3/sony_ps-lx300usb_belt_replacement.pdf
    • http://vudexejuvejutek.rf.gd/kenmore_ultra_wash_dishwasher_model_665_not_draining.pdf
    • http://vabizofolimise.epizy.com/how_to_pronounce_plato_in_spanish.pdf
    • https://uploads.strikinglycdn.com/files/ddd920ed-1b0a-4d76-99d1-921a023706f3/wanam.pdf
    • https://99516632-72ce-40f3-a9a1-a01c91361c65.filesusr.com/ugd/e42c35_761624ca47f84d3e9e0ad138d206fb7b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d7e161ff-9647-46f3-b456-0bf002187295/hamilton_beach_flexbrew_replacement_carafe_49983.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe6e.bin
78e03fb0b0a95071e9dc27cb74d796fc01fd87d623e9066fbab2fab8fd5c5adb
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6E 5372 bytes
font_01_sfnt_off000110b3.bin
429f3b1d0d4e0c3fc962fc5e533aab54e7d5eb494feb463745cd8c0f55a9b5f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x110B3 10528 bytes