Malicious PDF — malware analysis report

Static analysis result for SHA-256 64442f4c8957d08c…

MALICIOUS

PDF

76.4 KB Created: 2021-03-15 05:18:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d5350a29bf47b6a55941bcaa8c87235e SHA-1: e5c2929d81813112a7d943e6d3abd0966f961d9c SHA-256: 64442f4c8957d08c3445feb3a02a3ed365f68e8a2e9343b5fd5dbbf8b9b571a0
164 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 a large number of external links characteristic of an SEO link farm 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 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • 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://jottigo.ru/strik?utm_term=beethoven+piano+sonata+no+1+in+f+minor+sheet+music PDF link annotation
    • https://bewapuvin.weebly.com/uploads/1/3/1/4/131453684/lowemuridagoxa-zonolateloxo-bafofeg.pdfIn PDF document text
    • https://dorenezawux.weebly.com/uploads/1/3/5/3/135383086/4851003.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473916/normal_5ffa79be032dd.pdfIn PDF document text
    • http://jusibebobekig.iblogger.org/allen_bradley_plc_specification.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417997/normal_5ffdc343c92b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383137/normal_5ff8ad6c2113e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459794/normal_5fe5d9be62967.pdfIn PDF document text
    • https://popetufuwude.weebly.com/uploads/1/3/1/4/131483025/sisogawaremupa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374682/normal_6022094413aea.pdfIn PDF document text
    • https://noxerurivago.weebly.com/uploads/1/3/4/7/134767941/ratewefunimepesan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nuxumejaxumem.epizy.com/fraction_bars_manipulatives_printable.pdfIn PDF document text
    • http://gobonelore.epizy.com/sajonizaxipoposuwekib.pdfIn PDF document text
    • https://78fa80b2-8629-447b-ad63-53e91e8d4948.filesusr.com/ugd/8f02de_045acdc07b214831ba5e3b8826d8a6d0.pdf?index=trueIn PDF document text
    • http://ritanuwo.epizy.com/busulubunegitunosevis.pdfIn PDF document text
    • https://94db4134-5784-44c5-a63d-963e509970fa.filesusr.com/ugd/9c58c5_d4e042aa71d944399b5a1a416b6b0d5f.pdf?index=trueIn PDF document text
    • http://sotatelovutegep.epizy.com/bovogupapibuxabebobap.pdfIn PDF document text
    • https://cae2aa39-5014-47ec-b549-0fed73f36d02.filesusr.com/ugd/c8683e_d5a393c39e5d4988a9b2a001c7dcb528.pdf?index=trueIn PDF document text
    • http://pirixifivojove.rf.gd/crochet_pattern_for_bulky_yarn_baby_blanket.pdfIn PDF document text
    • https://ed36ca5d-e6e9-4caf-8bbb-3a8af5cfee16.filesusr.com/ugd/971556_0d123add775944628012012490e3f441.pdf?index=trueIn PDF document text
    • https://52aa71f3-9574-4e96-898b-bb16aa893b2c.filesusr.com/ugd/b13a71_5106fdb3af3244d2979ee55e986f9d4d.pdf?index=trueIn 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_off0000e941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE941 5384 bytes
SHA-256: 8d0f4466a229dbb46cc7a386363a832dfd64c4b283fda6169d5be15b74f29770
font_01_sfnt_off0000fb7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7A 11984 bytes
SHA-256: 623d686a43e6a853ac1b9a07d1a039d349406997ac6e0d9c0eba8695adc2be04

Open this report in the interactive analyzer, or submit your own file for analysis.