Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb04c9b2ce18fe11…

MALICIOUS

PDF

81.2 KB Created: 2021-04-23 22:55:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 671ee334c738c4cf2169a8426daad326 SHA-1: 69ed4a0353c1c292feea667f40ef2f70dd3b6dbd SHA-256: cb04c9b2ce18fe113ee9c82c569e2a76cddbca08e981cee53528cfbf20863ef6
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely to deliver a malicious payload or phish for information. The document body, though partially corrupted, contains text related to 'krav maga' and the suspicious URL, suggesting a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://seumenha.ru/strik?utm_term=how+to+practice+krav+maga+at+home
    • http://bivoliku.mywebcommunity.org/present_perfect_tense_mixed_exercises.pdf
    • https://gejixivipoza.weebly.com/uploads/1/3/0/9/130969358/9001796.pdf
    • https://gelasinez.weebly.com/uploads/1/3/4/7/134763890/337420e562a6b2.pdf
    • https://nagajaburelu.weebly.com/uploads/1/3/2/7/132740350/sokovar.pdf
    • https://cdn.sqhk.co/zudipoje/evLrFid/pukavuwabi.pdf
    • http://sarawavenudiwap.mygamesonline.org/algae_biotechnology_products_and_processes.pdf
    • http://sizerasadaxer.mywebcommunity.org/mimujekuwesigemebimojizuv.pdf
    • http://timinome.getenjoyment.net/98572449841.pdf
    • https://cdn.sqhk.co/solumapidema/agfahf0/pixel_gun_3d_pc_download.pdf
    • http://lobabinuladeri.medianewsonline.com/naligibarubuvopatejilim.pdf
    • https://cdn.sqhk.co/zimopiroxab/cjfFjdr/49310919437.pdf
    • http://gakawisogafuga.mygamesonline.org/kapokepojesidadosetofifas.pdf
    • https://cdn.sqhk.co/guviterolovu/dgcidja/board_of_directors_job_description.pdf
    • https://waliruwixogipi.weebly.com/uploads/1/3/4/0/134016871/0cfc7a4d4f34.pdf
    • http://kazexezawulozij.mypressonline.com/9026027817.pdf
    • http://fosipuzo.mypressonline.com/gosadek.pdf
    • http://wejuzofibab.medianewsonline.com/xiramikejekenajox.pdf
    • https://cdn.sqhk.co/mekibekowufe/ifielO0/sesumibajixokekun.pdf
    • http://dalifajebuxog.scienceontheweb.net/introduction_to_phonetics_and_phonology_from_concepts_to_transcription.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://gamelaluwer.myartsonline.com/succeed_in_cambridge_cae_10_practice_tests_key.pdf
    • https://uploads.strikinglycdn.com/files/0b33498c-7532-43c2-9ebd-ab7be88e0285/husqvarna_129l_weed_eater_string_size.pdf
    • https://uploads.strikinglycdn.com/files/add2a085-d909-4fc4-94de-f6bdea949453/kusegibirepetamimi.pdf
    • https://uploads.strikinglycdn.com/files/b0c2699e-6821-4654-a928-3c4cf3263076/how_long_should_a_pool_heater_last.pdf
    • https://uploads.strikinglycdn.com/files/234a4c7a-9ff8-48cf-a6a1-51dd39ddf4b2/1734099449.pdf
    • https://uploads.strikinglycdn.com/files/2a54d372-0a1f-4686-9d31-a30e466b1ced/washington_state_senators_phone_numbers.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_off0000f244.bin
0e8da79a1518b4a61643db6765045f5e4fe913eec13f5a411e0365a07588fd8e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF244 4996 bytes
font_01_sfnt_off00010353.bin
5f831749582a92d5e68b7c94e72eb5e2f7b8518fe213b44dca9e69ceb62bc372
pdf-font-stream PDF embedded font (sfnt) at offset 0x10353 10908 bytes
font_02_sfnt_off0001289b.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1289B 4324 bytes