Malicious PDF — malware analysis report

Static analysis result for SHA-256 88b4d73009a1fa36…

MALICIOUS

PDF

75.8 KB Created: 2021-04-21 13:50:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5599574624412c0c11f0a952c010e8ae SHA-1: cd69260f20344af0c0ea2c2c54619af3cafc5f9c SHA-256: 88b4d73009a1fa3649f2164e4dc640ec7290b0548e4e9acf11bd544a6ffd4aa2
156 Risk Score

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 0.9993

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://fokemale.ru/strik?utm_term=why+is+cultural+safety+important+in+the+workplace PDF link annotation
    • https://cdn.sqhk.co/mujetujojen/fSgjja4/wujixalew.pdfIn PDF document text
    • https://vexofemefenulo.weebly.com/uploads/1/3/4/5/134594555/dutogu.pdfIn PDF document text
    • https://vawuwoteb.weebly.com/uploads/1/3/0/9/130969488/06d767056.pdfIn PDF document text
    • https://cdn.sqhk.co/vasozaponem/dgWjeif/96188216160.pdfIn PDF document text
    • https://cdn.sqhk.co/wejupexuput/XifmjeO/62812571062.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/h5jithg/zivazopemedidubobivaradak.pdfIn PDF document text
    • https://norotenivepele.weebly.com/uploads/1/3/4/0/134042349/bf14e.pdfIn PDF document text
    • https://gilurabad.weebly.com/uploads/1/3/0/7/130775641/7565140.pdfIn PDF document text
    • https://cdn.sqhk.co/resilano/hdjghg9/25592738068.pdfIn PDF document text
    • https://cdn.sqhk.co/jaziwuke/vjajfjc/yellow_cab_chandler_az.pdfIn PDF document text
    • https://zogopovedizojux.weebly.com/uploads/1/3/1/4/131408172/dilagofawofopobeweka.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/zinudipir/how_to_edit_midi_drums_in_garageband.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/24101479782.pdfIn PDF document text
    • https://a40b6db0-1679-4e03-879f-ac5827b9aa7d.filesusr.com/ugd/dba42a_107a6ec25b4c416b890793f12bc3f5f6.pdf?index=trueIn PDF document text
    • https://3e3188f7-d9e9-48da-9af6-4e6760718ee0.filesusr.com/ugd/4f7562_3fc3a6537fbe48fca51742039e398c6e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/ballpark_estimate_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/gotarudemabires.pdfIn PDF document text
    • https://s3.amazonaws.com/nojemi/xevunebikabukudafad.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/xajojesororewed.pdfIn PDF document text
    • https://d0a6b1b1-1773-4622-8b5e-0ab5990a7ed3.filesusr.com/ugd/b90ba1_3e3a9b5fcc4c4911992e52330bbe5554.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/neporezofov/xufotugimurareninodaduzok.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/humminbird_helix_5_gps_fish_depth_finder.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/gojevimilakatarutabiduvem.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_off0000ebd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD1 5528 bytes
SHA-256: 952e870eabef65258912b0b091e560de86b5566989ef4ee959228d5d5e5510a8
font_01_sfnt_off0000fe93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE93 10116 bytes
SHA-256: a8dda34417ef07848357dbfb5d4f6aa7bd5e2732d00b28cb6130c4a33f66ddfc

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