Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d9f427e4f7372f9…

MALICIOUS

PDF

78.4 KB Created: 2021-03-24 13:55:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6b827b71a50d0943d85fe9d9256a4d95 SHA-1: b2a15e7b457a894109a1f0d9d13b790181c93ade SHA-256: 4d9f427e4f7372f989524174a95743332c03ec70815ede736ce79bad1ebfe661
162 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 routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://yafferge.ru/strik?utm_term=how+to+draw+a+heart+and+label+it In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379610/normal_6042c3c252378.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463272/normal_6011358f42dc8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456135/normal_5fce604ee16ba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450502/normal_5fdfb372d76df.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/9abef341-eb43-498e-af8a-b3e1c1528f62/jibadu.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/11408069745.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d893679f-ef13-4936-a28e-82b9caab7b14/how_to_to_write_a_thesis_statement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79278fc5-c8c8-49c7-af4f-a9ad1fe1fa65/rimax.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/nifegivexugebefeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ff8deb6-08d7-4571-95df-fb2340336f0e/60482385960.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/pukujebisobimilugen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdfab080-b9b4-4eb1-ac66-80e18a82e2a0/jexapefevuzojikavujixer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4785c975-b3a0-4c92-9f5b-418c99b6c70a/dave_landrys_10_best_swing_trading_patterns_and_strategies.pdfIn PDF document text
    • https://s3.amazonaws.com/mixanaz/jowejikoduwerojaveferotim.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/how_do_i_program_my_remote_to_my_cable_box_spectrum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5ee6a9c-8988-4ab5-a7ae-ba67e780fe1b/does_oracal_651_stick_to_canvas.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/how_to_connect_hp_officejet_pro_8600.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/muxoxorek.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/flag_day_worksheets_for_kindergarten.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5902dcd-d9ee-436e-abdf-1e84cb535011/segejizisojofagewiza.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/74839770124.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/garnier_serum_sheet_mask_for_dry_skin.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FE 4928 bytes
SHA-256: 68145c548a70ae01b4e186a29a1bd034e5a776932f371fa74b06425db9500095
font_01_sfnt_off000107c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C4 10816 bytes
SHA-256: 3265ec0eef3723035b9c0c0364ed7bd7af23823598e59d9d2529ddef136619e8

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