Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeb7e0627929869b…

MALICIOUS

PDF

88.9 KB Created: 2021-03-09 18:16:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 188266abc8bf1b41ff200880b139b203 SHA-1: e6304742267378e65a29c1f3711d70f3d99d4b2d SHA-256: eeb7e0627929869b0fc88eba847fd155e86f407b7a7eacc55321e70cb335631f
126 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, indicating a phishing or trojan distribution attempt. It contains numerous embedded URLs, including one pointing to 'midufefew.ru', which is likely part of a campaign to redirect users to malicious sites. The document body, though heavily obfuscated, contains references to 'Macbeth script act 2' and 'wkhtmltopdf', suggesting a lure or a tool used in the generation of the malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://midufefew.ru/strik?utm_term=macbeth+script+act+2 PDF link annotation
    • http://poguzozod.sportsontheweb.net/how_do_you_stretch_your_piriformis_muscle_while_sitting.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376374/normal_5ff17ee1cbc6b.pdfIn PDF document text
    • http://counterman.ru/lusijurudakui0zig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463559/normal_60243430740c5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368949/normal_60015afc6223e.pdfIn PDF document text
    • https://cdn.sqhk.co/wefopijupe/7havuhd/vavogavexoroni.pdfIn PDF document text
    • http://vetobiz.sportsontheweb.net/difference_between_linear_and_nonlinear_equations.pdfIn PDF document text
    • http://jekenufakewe.mypressonline.com/xpress_m2835dw_imaging_unit.pdfIn PDF document text
    • https://cdn.sqhk.co/napumefu/qjfgjdq/merriam_webster_learner_s_dictionary_premium_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443578/normal_600b4886ed9af.pdfIn PDF document text
    • https://cdn.sqhk.co/retobumoki/cqCYegh/moto_camera_2_apk_moto_z2_play.pdfIn PDF document text
    • http://profibrend.ru/how_to_set_my_westinghouse_timer883n9.pdfIn PDF document text
    • http://ita-yog.space/dionne_clueless_costume_party_cityj6ncu.pdfIn PDF document text
    • http://studyweb.site/direct_inverse_proportion_worksheet1855x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369149/normal_60326cbd7e7d8.pdfIn PDF document text
    • https://cdn.sqhk.co/pugirunosamo/gfM0eid/bluestone_state_park_meador_campground_map.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472503/normal_5fd79e92be24a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421048/normal_6031635f68bb2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8488b7ac-84bc-45ae-88ed-26841205fc59.filesusr.com/ugd/7cda3c_e410a05be38b4ebb8bb2aeb03f9abbef.pdf?index=trueIn PDF document text
    • https://0d3c4653-ec4b-4b04-9c20-59e348ba858e.filesusr.com/ugd/62200f_8525666913324f269bd9ce00f3d286a5.pdf?index=trueIn PDF document text
    • https://4d75d3c9-3a4d-4df6-84ab-e48b83d723e5.filesusr.com/ugd/cdb50c_06f63f90afc748dc8cbf7ed8eb08163c.pdf?index=trueIn PDF document text
    • https://0ea28b16-58c2-472d-b6be-3e97fe9b7bb6.filesusr.com/ugd/696b8a_e87a28d9228346fab6abcbec30639340.pdf?index=trueIn PDF document text
    • https://64e18f06-8a0e-4dc1-8427-9dd81b4bff36.filesusr.com/ugd/baa514_09a0e827f2bc40a38a93dc619d4598a7.pdf?index=trueIn PDF document text
    • http://rukosivujuxu.atwebpages.com/how_to_connect_anker_soundsync_drive.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010abc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABC 5268 bytes
SHA-256: b274facb3ef5391cfc75780c7a5e7977b948f9c306f7221560ce942e743d905a
font_01_sfnt_off00011ca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CA4 10684 bytes
SHA-256: 3b9844776a7b8d4f4aca79e1a1678890b280ad6df147f667b7a00a3bb7b63e92
font_02_sfnt_off0001413e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1413E 16028 bytes
SHA-256: 8345d1cc2b6b461b856d0454e2cf67edf5851291b6d0ebf21a7da0c9813a2b7f