Malicious PDF — malware analysis report

Static analysis result for SHA-256 8df1a7a3cf21c10f…

MALICIOUS

PDF

79.5 KB Created: 2021-03-28 04:19:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7cc315359ae4c8ed60298ddc56bf3e41 SHA-1: d243c43899f8d99b4379936febcf0cd4192fd7af SHA-256: 8df1a7a3cf21c10fa945d8e6d21ff77d63f63589c54da2162d0c55e668383a07
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a critical heuristic firing for Pdf.Phishing.Trojan. The embedded URL points to a suspicious domain, and the document body, though corrupted, suggests a lure related to a 'course guide'. The presence of PDF_URI and EMBEDDED_URL heuristics indicates attempts to redirect users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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/wix?keyword=bentonville+high+school+course+guide+2019
    • https://cdn-cms.f-static.net/uploads/4459780/normal_605fafc884575.pdf
    • http://godupizu.iblogger.org/xiduxodi.pdf
    • http://sluzhba1.net/jelaskan_konsep_cash_flow_quadrant_dari_robert_t_kiyosakifj5pj.pdf
    • https://cdn-cms.f-static.net/uploads/4482206/normal_6029e4d640f8e.pdf
    • http://vas-rem.ru/gems_of_war_soul_farming_guideg84us.pdf
    • http://nezikemin.iblogger.org/3rd_grade_math_worksheets_addition_and_subtraction_word_problems.pdf
    • http://lnstagramverifiedbadge-form.com/79054934852sav93.pdf
    • https://static.s123-cdn-static.com/uploads/4377403/normal_5ff17a9257f61.pdf
    • http://pomirkapa.site/9712668842887pzr.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/fe1a2f9d-c5a4-4c9d-9ba0-bd1f41c7b38b/51366102891.pdf
    • https://uploads.strikinglycdn.com/files/66cd93fe-8105-48e0-b2b0-9e54e16b37c7/what_pokemon_does_red_have_in_lets_go.pdf
    • https://uploads.strikinglycdn.com/files/95356041-90cd-4991-8bc2-2029a69fd23b/nozuxabetepenufu.pdf
    • http://zukufefomuzaz.epizy.com/venezuela_crisis_explained.pdf
    • http://ruzapuloj.epizy.com/nerowuxa.pdf
    • https://s3.amazonaws.com/watajive/40356934470.pdf
    • https://s3.amazonaws.com/bulolimepol/auxiliary_verbs_worksheet_for_grade_1.pdf
    • http://veridipu.rf.gd/cen_cenelec_guide_22.pdf
    • http://wegajovekesowor.epizy.com/migapanalodiwa.pdf
    • https://uploads.strikinglycdn.com/files/f9a0ca38-4c5f-496c-bc6c-e48d329b378b/cx_vs_cx_ii.pdf
    • https://s3.amazonaws.com/divelikubapiwaj/watson_analytics_101_final_exam_answers.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_off0000eafe.bin
9d282704a67ddb4314b6985525c8043cf2b83c7cb382aebc18898960e830c7af		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFE 3420 bytes
font_01_sfnt_off0000f74f.bin
d07a86fae9226c0b84a14684d06767ad75134bd6a510529ec10f60fdfcce71a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF74F 5584 bytes
font_02_sfnt_off00010a5a.bin
82d37bea78082ff08caf82ec4f657fd67f6258cea1b938342dd9d1288e9fcd8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5A 11072 bytes

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