Malicious PDF — malware analysis report

Static analysis result for SHA-256 b61bd65a61e40848…

MALICIOUS

PDF

90.8 KB Created: 2021-03-21 11:20:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40f4c75896084a8cbaf34cad026a2546 SHA-1: ceb4fc39943ee52ae70e1272e44977f89b23ef43 SHA-256: b61bd65a61e40848ebc185fe7c1979c21e163a10e647935f70e4a66c5aad7d81
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'dafemum.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to 'customer centricity', aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://dafemum.ru/award?keyword=importance+of+customer+centricity+pdf
    • https://cdn.sqhk.co/salejejo/dgi2hhf/disconformidad_alta_medica_inss.pdf
    • http://rawoferifexa.22web.org/why_is_my_centurylink_internet_light_blinking_green.pdf
    • https://cdn-cms.f-static.net/uploads/4382773/normal_600c3d1614a8f.pdf
    • https://cdn.sqhk.co/geroterunetu/fjfgggi/high_temperature_cooking_oil_for_grill.pdf
    • https://cdn.sqhk.co/nutakurij/diegejg/carpenter_ant_nest_removal.pdf
    • http://gidedaz.iblogger.org/26172409548.pdf
    • https://cdn.sqhk.co/vazaradigif/ehbhfbK/tulinekupigime.pdf
    • https://static.s123-cdn-static.com/uploads/4462037/normal_5ff71bdad866a.pdf
    • https://cdn.sqhk.co/kefesizo/ji1jbmM/hungry_shark_world_hack_2020_mod_apk.pdf
    • https://cdn-cms.f-static.net/uploads/4450512/normal_602f4a0ae3de1.pdf
    • https://cdn.sqhk.co/karapazepot/Qw5kejj/child_care_aware_nh_professional_registry.pdf
    • https://cdn-cms.f-static.net/uploads/4502493/normal_60472b09c4708.pdf
    • https://cdn.sqhk.co/famazipow/HchejaN/how_to_mix_colors_to_make_black_fondant.pdf
    • http://vafijevimam.iblogger.org/acetic_acid_msds.pdf
    • https://cdn.sqhk.co/rejiwosujupa/brig1J2/44996794581.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/39903a53-5146-462a-81f2-88b0987cffa3/cisco_ccna_study_guide_2019.pdf
    • https://s3.amazonaws.com/gatazeromij/awas_plus_data_entry_report.pdf
    • http://wiraxowofes.epizy.com/how_to_be_in_charge_of_your_own_happiness.pdf
    • https://s3.amazonaws.com/toniseligiwuzux/phonological_awareness_activities_for_preschoolers_at_home.pdf
    • http://danokob.epizy.com/ncert_full_form_in_kannada.pdf
    • https://s3.amazonaws.com/gezizefefififa/eagle_bird_pictures.pdf
    • https://s3.amazonaws.com/sefabe/vufamumeda.pdf
    • https://uploads.strikinglycdn.com/files/349982ee-7819-4c9a-8b65-13ddaafbcf8a/introduction_to_environmental_engineering_5th_edition_solution_manual_free.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_off00011a1a.bin
2d621754a031b1e07d78e00936f70b128a138e6362ba026b83e501973a506bb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A1A 5308 bytes
font_01_sfnt_off00012c10.bin
dae0f12506c17deaa818396cb86411da2f7a72f10e575d6fda98e021880a3e82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C10 2744 bytes
font_02_sfnt_off000137bb.bin
7e0047011609245122cf450a99a54f79b410d193837c6f76988c300a05bcfa51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x137BB 11036 bytes

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