Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6bdf4e7d2de255a…

MALICIOUS

PDF

44.8 KB Created: 2020-11-09 00:23:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0d7f744519f3c5b5addde81cd180e65c SHA-1: 1791652db0192fc4765ebc9b19c3950bd5e5e7ee SHA-256: a6bdf4e7d2de255ad465f55c40580e7242117eb813ebc4e59b8510837678530f
74 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by 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 1.0000

Heuristics 5

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffnew.ru/123?keyword=my+talking+tom+mod+apk+android PDF link annotation
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/8746e.pdfIn PDF document text
    • https://dipedupaketi.weebly.com/uploads/1/3/4/3/134333799/vamozu_ravam_balebel.pdfIn PDF document text
    • https://lumikefobebodas.weebly.com/uploads/1/3/4/3/134324067/4300279.pdfIn PDF document text
    • https://netaterosani.weebly.com/uploads/1/3/4/4/134438803/9575293.pdfIn PDF document text
    • https://naroxelilokatud.weebly.com/uploads/1/3/1/3/131384214/dixemomot_boredirexokaj_nexiwufib_sepaniw.pdfIn PDF document text
    • https://gogebuzavoriro.weebly.com/uploads/1/3/2/6/132681212/zoxux.pdfIn PDF document text
    • https://tutusilubejisev.weebly.com/uploads/1/3/4/5/134599447/sekaruvo.pdfIn PDF document text
    • https://dasujodiket.weebly.com/uploads/1/3/4/4/134481559/zobev.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/mipizaju/nivego.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/betefanelilokokezez.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/kinh_cam_on_sau_ruoc_le.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/67258354345.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/david_taylor_pastor_charged.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f82cdf2-d202-41dd-95db-f210ed9e8dad/6039560400.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/risk_benefit_analysis.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_off00006f67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F67 5272 bytes
SHA-256: 2feb7d42598e35b86f6b3a08fbc98bff514405200d33662cbb77459ebda1f38c
font_01_sfnt_off00008157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8157 10968 bytes
SHA-256: 23d1c8b89c7167a44c0a961cb2f0545c492bbcbaba493d753c3054abaa91cb73

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