Malicious PDF — malware analysis report

Static analysis result for SHA-256 89c742d2f4570b52…

MALICIOUS

PDF

74.7 KB Created: 2021-04-08 22:26:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2f9cdf749ddb0e783c0c0ba291a6ce3b SHA-1: db35e4b0b58aa6b84b6b859e44b8d0b0b9189acc SHA-256: 89c742d2f4570b5201568d420b1edfdb6312baa88c7bf37a268fe30444fb2c13
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://zajinet.ru/strik?utm_term=us+public+law+99-514 PDF link annotation
    • https://cdn.sqhk.co/jojojidatun/fGibRjc/20229950078.pdfIn PDF document text
    • https://cdn.sqhk.co/ribafesupuro/hcvwCgd/amaze_balls_3d_shortcut_run_block_puzzle_games.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414860/normal_6017268a7000a.pdfIn PDF document text
    • https://wujipiledulom.weebly.com/uploads/1/3/4/6/134695719/rizadetaxafapum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419849/normal_6005f3ffe1653.pdfIn PDF document text
    • https://cdn.sqhk.co/wejagamewo/jehaAjj/50697147063.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367290/normal_604b621509bf9.pdfIn PDF document text
    • https://kovuvewu.weebly.com/uploads/1/3/2/6/132695697/suneg.pdfIn PDF document text
    • https://cdn.sqhk.co/zepigelona/eidmgdf/16284060451.pdfIn PDF document text
    • https://fekalebewobazo.weebly.com/uploads/1/3/4/6/134668576/7bab0a7aa9.pdfIn PDF document text
    • https://cdn.sqhk.co/waxoxewanuvi/iaJhdK3/history_of_art_2001_osu.pdfIn PDF document text
    • https://cdn.sqhk.co/luwivimexu/mIgjjfh/67738782607.pdfIn PDF document text
    • https://cdn.sqhk.co/wifopuzuxiba/eshhopE/pencil_sketch_artist_jobs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449630/normal_6022e6931aca0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454824/normal_6048bf04e4a8d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374520/normal_5feb19acc2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/97aff4dd-d2a1-467e-b79a-d95c8667b9e8/56548592945.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61fbe1c0-e360-47e8-8588-949f7c4e2adb/is_hyperbole_a_rhetorical_device.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dd84dbe-d24b-45f9-aa0d-2ec0d0d5520b/what_does_the_word_tree_of_life_mean_in_the_bible.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9f0a362-d13e-442b-9c2b-0fd03b467083/62273616417.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e73d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE73D 5508 bytes
SHA-256: 9aaedc4d73519f4cb2b5b51da7e8b84cebc90b73c389d937f97ff9df5f3086c6
font_01_sfnt_off0000fa36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA36 10468 bytes
SHA-256: d6e43eeac7f0c6095ffaf86340063d81d67442540b8e7c5e417b5f433335af9c

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