Malicious PDF — malware analysis report

Static analysis result for SHA-256 178c073a598c2a38…

MALICIOUS

PDF

78.1 KB Created: 2021-03-29 11:12:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a90dbd91b89585dbbbd06fd85fb9a861 SHA-1: 343326905abfbbd8dab6169a446534efaee96cb9 SHA-256: 178c073a598c2a3800f2c5664d7c4bcc412cdd09aec1d7781610eb92fcc20da4
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 specific detection name indicating it's a phishing trojan. The PDF contains an embedded URI pointing to a suspicious domain, which is a common tactic for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/award?keyword=barriers+to+organizational+learning+pdf
    • https://cdn-cms.f-static.net/uploads/4375350/normal_604cef1c5b3b9.pdf
    • https://cdn.sqhk.co/xifusajexom/hhJgfjg/freedom_of_information_act_letter_template.pdf
    • https://cdn-cms.f-static.net/uploads/4451742/normal_600b712f480ea.pdf
    • https://cdn-cms.f-static.net/uploads/4423442/normal_60527dedc61da.pdf
    • https://static.s123-cdn-static.com/uploads/4460723/normal_5ffdfe550e8a0.pdf
    • https://cdn.sqhk.co/pojuwudedi/Tieiige/bkash_helpline_no.pdf
    • https://cdn.sqhk.co/jijatidos/bCBDhfh/rolling_ball_obstacle_course_game.pdf
    • https://cdn.sqhk.co/zivuzigup/aqYhcih/greenleaf_episode_guide_season_3.pdf
    • https://static.s123-cdn-static.com/uploads/4373755/normal_5fcdb0ac3ea6c.pdf
    • https://static.s123-cdn-static.com/uploads/4475741/normal_5feb805456046.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kozewuposoridil/claverham_community_college_ofsted_report.pdf
    • https://uploads.strikinglycdn.com/files/89bc5188-a958-444b-abeb-df09d23d15b2/samsung_wf210anw_xaa_door_seal_replacement.pdf
    • https://uploads.strikinglycdn.com/files/0469040b-4e8b-4ecf-a89b-ea49a7501c50/behringer_q802usb_xenyx_premium.pdf
    • https://s3.amazonaws.com/jezekemunidup/91088013141.pdf
    • https://uploads.strikinglycdn.com/files/deca1900-9ad8-4db1-86ef-86636336ecb4/how_to_do_backwash_filter.pdf
    • https://uploads.strikinglycdn.com/files/78ae7489-0f6f-490b-98d1-5a7b03eeec45/eaton_transmission_fault_code_88.pdf
    • https://s3.amazonaws.com/mutirexa/allowable_coliform_bacteria_in_drinking_water.pdf
    • https://uploads.strikinglycdn.com/files/0fc3c744-a2ed-4642-bb6f-19ac97d30600/honda_eu2000i_parallel_kit_manual.pdf
    • https://s3.amazonaws.com/dazawojob/debasinuvubemi.pdf
    • https://uploads.strikinglycdn.com/files/b96fc73c-c9a9-4cb9-9b99-778bc8804c74/zoliseligisorazara.pdf
    • https://uploads.strikinglycdn.com/files/15a8f625-d67b-488d-b67e-3f2e14ab81d3/how_to_be_average_book.pdf
    • https://s3.amazonaws.com/mexijegedakol/zubapogalexetajutirawepe.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2ab.bin
384a2a4eacb113196d1ad7abe9014d605f662186ab081b29be5bbc7df5931de0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AB 5308 bytes
font_01_sfnt_off000104d5.bin
a7744b9af9282a4aef3f7078b282efdd1c4029f34f3fa3dd1d925aee004929e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104D5 11124 bytes

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