Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a9fefe8f984a35a…

MALICIOUS

PDF

81.3 KB Created: 2021-04-17 14:41:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9bb17fc038d9722469850e453fbbf9a1 SHA-1: a740064ff88d660b868de8e4e0d0af77eb1e9428 SHA-256: 5a9fefe8f984a35ac295afc2b06dab3486ebc2ac28e90eac93feb79a106148da
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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.
  • 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://dugedepap.ru/strik?utm_term=breville+mini+smart+oven+parts PDF link annotation
    • https://cdn.sqhk.co/jiloduvunilu/jiNCMUT/wiketude.pdfIn PDF document text
    • https://cdn.sqhk.co/gupetipek/Ghc3K9f/19946717641.pdfIn PDF document text
    • https://cdn.sqhk.co/koxopumo/jjMbpic/bekenabatanadepusapireles.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447251/normal_6056840d98d53.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423154/normal_5ff5cf9483327.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420451/normal_605cdb62dff9e.pdfIn PDF document text
    • https://cdn.sqhk.co/diwiporeb/iKIAo2m/tiger_shroff_all_video_song_download_mp4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468268/normal_5fe81ab6c8b3f.pdfIn PDF document text
    • https://cdn.sqhk.co/jategumeb/bUjc2dZ/youtube_video_downloader_chrome_os.pdfIn PDF document text
    • https://cdn.sqhk.co/ninuxoti/idhhhaQ/kanedaje.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/hgK2fsf/9077058360.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380523/normal_5fc7745a8b6a1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/xmanager_enterprise_3_free.pdfIn PDF document text
    • https://d5bea983-5bca-41ba-aae6-6b688785cc77.filesusr.com/ugd/9ec29b_3d99ae4678b9499e925806dddee88d70.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/davawina/87082561696.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/chest_wall_deformity_treatment.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/victor_frankenstein_movie_dual_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/85034195649.pdfIn PDF document text
    • https://44879a12-c10a-431c-a98a-7de142752d0f.filesusr.com/ugd/bb4607_57a63ed578744232a78915074c60d7c0.pdf?index=trueIn PDF document text
    • https://9d1e48ad-bcd7-4831-9b7b-7108443a63b6.filesusr.com/ugd/136d07_c4b91b515ead4225bfb81c7e6b00085f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/29304303421.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/ibm_qradar_dsm_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/tafoxux.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_off000100b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B1 5072 bytes
SHA-256: 04db93a0b51067f0e012d35a59f0bfa551ab3259a31177dde2cba0d7c0f62d14
font_01_sfnt_off000111de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111DE 10656 bytes
SHA-256: 7dee1cf70e3df36c565e64c519c03dee95144f500e03e2d678d6fcba7e5868c9

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