Malicious PDF — malware analysis report

Static analysis result for SHA-256 05d27ae1549b27fc…

MALICIOUS

PDF

69.5 KB Created: 2021-03-28 00:13:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4ea8b67c126cc272e17eb0cac20edf4 SHA-1: 1956568e3b97cfbb635d88ea3fb85f1496dd7ff5 SHA-256: 05d27ae1549b27fcea2bd8a64a13cc42de1abe6c8f9ed0072642f7a026f513ff
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a phishing or malicious content lure, indicated by the 'PDF_SEO_LINK_FARM' heuristic which detected a large number of external links. The presence of the URL 'https://vilenefex.ru/award?keyword=bulk+carrier+practice+pdf+free+download' suggests an attempt to direct users to potentially harmful content under the guise of a free download. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8511

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://vilenefex.ru/award?keyword=bulk+carrier+practice+pdf+free+download
    • https://dukupifit.weebly.com/uploads/1/3/0/7/130775427/1707515.pdf
    • https://cdn-cms.f-static.net/uploads/4403681/normal_60251a077e92c.pdf
    • https://tanatomunedasov.weebly.com/uploads/1/3/5/3/135325499/gebosakazusuxul.pdf
    • https://static.s123-cdn-static.com/uploads/4389108/normal_5ff9024d852e1.pdf
    • http://rasezatoxefu.mygamesonline.org/what_page_does_atticus_sit_outside_the_jail.pdf
    • https://mapulanedubo.weebly.com/uploads/1/3/0/9/130969056/punufez.pdf
    • https://wajuzetixageg.weebly.com/uploads/1/3/0/9/130969085/469ae8979.pdf
    • http://dasiwujupuna.sportsontheweb.net/celtic_influence_on_english_language.pdf
    • http://muzesumulel.getenjoyment.net/zoxigajozotijajipake.pdf
    • https://nesipemuwazona.weebly.com/uploads/1/3/4/8/134881126/ec353b741865.pdf
    • https://kixarazebeda.weebly.com/uploads/1/3/0/7/130776474/336f1d9d5cd.pdf
    • http://vazawujuzu.sportsontheweb.net/32075136962.pdf
    • https://fezimadi.weebly.com/uploads/1/3/4/4/134487715/dofotutaxa-moxodubuje-wubez-gejasizivol.pdf
    • https://dojudetokin.weebly.com/uploads/1/3/4/6/134613144/xibifiboxomizu.pdf
    • https://masezinonorokun.weebly.com/uploads/1/3/4/6/134685416/573c419ffb546e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fozozip.onlinewebshop.net/contaminacion_atmosferica_causas_y_consecuencias.pdf
    • https://uploads.strikinglycdn.com/files/f52a8497-9ef9-4eb0-9e83-5562f0f0af41/dunkin_donuts_iced_matcha_latte_nutrition_facts.pdf
    • https://uploads.strikinglycdn.com/files/131498da-b35f-461a-ba59-a173c03a837f/20081029355.pdf
    • https://uploads.strikinglycdn.com/files/3afafcb4-9dfd-4415-bbd6-6c5b0f6e4757/62764366022.pdf
    • https://uploads.strikinglycdn.com/files/0a3292b8-45fc-4838-a440-1f6f54440c91/37078199688.pdf
    • https://uploads.strikinglycdn.com/files/fc8072b7-adc7-422a-b755-b5b9a02a7880/how_to_know_what_gears_to_use_on_a_mountain_bike.pdf
    • https://uploads.strikinglycdn.com/files/90604ba0-4106-43c1-8ac7-f0d52112fa31/maths_book_for_class_7_solutions.pdf
    • https://uploads.strikinglycdn.com/files/d007b3e3-c9e7-452b-ac97-38048417a764/what_are_the_11_steps_to_writing_a_research_paper.pdf
    • https://uploads.strikinglycdn.com/files/e6794274-b235-467f-a77d-6f75490a5c2a/how_to_interpret_gre_scores.pdf
    • https://uploads.strikinglycdn.com/files/8e229f24-5876-45bc-a85a-33e8e3931546/97593827203.pdf
    • https://uploads.strikinglycdn.com/files/dd4baf6a-1053-4ef8-9022-9884eae1d44d/vinsanity_shred_ripped_in_90_days.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5b9.bin
6ac0eababb31400f12afac49637720100cc056185922fd4afce8e1aa541042d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B9 5176 bytes

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