Malicious PDF — malware analysis report

Static analysis result for SHA-256 eebd32bdec791fff…

MALICIOUS

PDF

83.2 KB Created: 2021-03-18 00:59:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 662d6655a34c286b4e91ea3fa4457711 SHA-1: 6eed18c60881180256e7d81396c5c65bb9be4121 SHA-256: eebd32bdec791fff917a186f7a652aa9a5613ded78e4fa2adedaae3dcfa4406b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to benign-looking PDF files, suggesting a link farm or SEO poisoning tactic. One of the primary external links, 'https://golowaki.ru/strik?utm_term=how+do+i+set+my+hp+printer+to+the+internet', is presented as a search query, likely to disguise a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://golowaki.ru/strik?utm_term=how+do+i+set+my+hp+printer+to+the+internet
    • https://cdn-cms.f-static.net/uploads/4444386/normal_6018364f3ecc5.pdf
    • https://cdn-cms.f-static.net/uploads/4451363/normal_60198ed51fe8d.pdf
    • https://cdn-cms.f-static.net/uploads/4461481/normal_5fd1ca6051cf2.pdf
    • http://pedaxofanor.mywebcommunity.org/bisection_method_mcq.pdf
    • http://lipoviwevaja.iblogger.org/mirakeluxoma.pdf
    • https://cdn-cms.f-static.net/uploads/4471106/normal_60434e99df44e.pdf
    • http://julaximufe.66ghz.com/atonement_movie_utorrent.pdf
    • http://bobixuposu.22web.org/24697699739.pdf
    • https://cdn-cms.f-static.net/uploads/4389797/normal_601daa8f1dfa6.pdf
    • http://jukavoluv.iblogger.org/what_does_the_nag_hammadi_library_say.pdf
    • https://cdn-cms.f-static.net/uploads/4458833/normal_601a5ba3bdf5a.pdf
    • https://static.s123-cdn-static.com/uploads/4487632/normal_6004087182ea3.pdf
    • https://falojaba.weebly.com/uploads/1/3/0/7/130776150/4df92fe2d4a6c00.pdf
    • https://memapuzubabevu.weebly.com/uploads/1/3/0/8/130813849/6798045.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lelikerakovet.atwebpages.com/naming_organic_compounds_with_functional_groups_worksheet_with_answers.pdf
    • http://rulamiji.onlinewebshop.net/vikugexifoj.pdf
    • http://vejidot.epizy.com/highway_safety_corridor_pennsylvania.pdf
    • http://mamowajen.rf.gd/30158853744.pdf
    • http://zuxamivim.epizy.com/xuwuneriwexolo.pdf
    • http://koxaxoboxuzir.epizy.com/how_to_bypass_parking_brake_for_dvd_player.pdf
    • http://jopuzasoxu.rf.gd/fender_japan_serial_number_guide.pdf
    • http://desasivitusuzux.epizy.com/52470356099.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010938.bin
092fb03c0458d4b7eb6f8112ab22c7d646cf53d929a1abbc2fa35339c000f09b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10938 5112 bytes
font_01_sfnt_off00011a88.bin
3ab7041f9618b9871c0b9e55fead6ea67bc635d162946dfbd9b61725ed4ff3da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A88 10892 bytes

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