Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0a82c98716da52d…

MALICIOUS

PDF

86.6 KB Created: 2021-05-10 17:51:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24421d9331a073715b3d426406268344 SHA-1: 9b0d9fe683bc18917197581a838652fcfc663766 SHA-256: c0a82c98716da52dbef06b423ad9557e8f76d39a46c3b13fd82df2abec515172
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious URL, which is likely used to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs. The presence of multiple external URLs further supports the phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 4

  • 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://xezojetit.ru/strik?utm_term=who+is+the+best+beatles+song
    • http://sifuzifixezija.medianewsonline.com/xazowizuned.pdf
    • https://cdn.sqhk.co/funuwovo/c0gftJA/nefezojadudesabamub.pdf
    • http://xijulefabogi.getenjoyment.net/biblical_timeline_chart.pdf
    • http://wozovumorawoka.sportsontheweb.net/adjective_worksheet_for_grade_7.pdf
    • https://cdn.sqhk.co/mezutowede/zjjjfR3/adventure_capitalist_cheats_2019_pc.pdf
    • http://xokebidukefu.getenjoyment.net/53337658361.pdf
    • http://helpverifybadges.com/book_summary_example_third_gradevpi1q.pdf
    • https://static.s123-cdn-static.com/uploads/4494893/normal_5fc70f4b93e6a.pdf
    • https://cdn.sqhk.co/dejijadu/ahhihia/85314057848.pdf
    • http://puwinowelin.medianewsonline.com/united_nations_millennium_development_goals_2020.pdf
    • http://miribut.mywebcommunity.org/9743870217.pdf
    • https://cdn-cms.f-static.net/uploads/4367279/normal_60342897caf27.pdf
    • http://mostovaya.pro/54024375280gsv95.pdf
    • http://rkconstructionsucks.com/codes_for_superhero_tycoonradsr.pdf
    • http://begetus11ppz.xyz/cdot_roadway_design_guidefb0vq.pdf
    • http://usersonlineguardingsettings.site/winitujerofexmdby3.pdf
    • https://cdn-cms.f-static.net/uploads/4368223/normal_600fa0210b7f8.pdf
    • https://cdn.sqhk.co/junulevi/1haUujd/carrageenan_vegan_uk.pdf
    • http://mikenitoxa.22web.org/79116199467.pdf
    • http://tobaliwono.mygamesonline.org/victoria_bc_street_map.pdf
    • https://static.s123-cdn-static.com/uploads/4450504/normal_5fc7663bd37f9.pdf
    • http://pidawudimo.scienceontheweb.net/vibalaxijolorifuwom.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://powagamojij.onlinewebshop.net/arabic_to_english_meaning.pdf
    • http://mutiwudixoni.rf.gd/who_is_playing_queen_elizabeth_in_season_4_of_the_crown.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010946.bin
111fcca54ec988ec3cd72aa69acd0e76344d6720ff381471a73067c121054574		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10946 4792 bytes
font_01_sfnt_off00011991.bin
a643771e1d01a16acda43fe2b727afb3c56f06cdc7a8fc92d82d8c3aee2ee737		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11991 10804 bytes
font_02_sfnt_off00013e62.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13E62 4324 bytes

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