Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7e3dcd6bf5c022a…

MALICIOUS

PDF

67.5 KB Created: 2020-12-22 00:00:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: ad4963f6faf4c9c904a75a1e5965e35d SHA-1: 2ca57afc2fe46cb0604e734630bd8adb906f5aec SHA-256: d7e3dcd6bf5c022ae230dbeb4f368ef797cb768dbcf051e94d399454781d14c9
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, including a link farm, and a heuristic indicating a download button lure. ClamAV detection and ML classification strongly suggest malicious intent. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution attempt, likely using a spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/strik?utm_term=kick+the+buddy+mod+apk+hack+download PDF link annotation
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/vezifixabarabu_xafopigul.pdfIn PDF document text
    • https://vexivager.weebly.com/uploads/1/3/4/6/134634122/mezabuzewosaxesujejo.pdfIn PDF document text
    • https://mabulibatelirip.weebly.com/uploads/1/3/4/5/134597637/e12d4b32d0.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/fizaxo/kipeduxadesef.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/99332611224.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/56025635268.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3a9ef43-f64c-45cc-9fd1-df0c6ab96519/medical_brew_ark_on_dinos.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf0fe18e72e5fdb9bc6ae/1606283518804/what_is_this_thing_called_science.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/bromont_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/bikini_body_guide_week_2.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/tavejegapedimorufupupe.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/noxototidomoparotazek.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_off0000cafd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAFD 5404 bytes
SHA-256: 6549f0aa23a45f4f6ab942563115bc9845a533dee7a34b822037b4d47a39f066
font_01_sfnt_off0000dd50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD50 10588 bytes
SHA-256: 28bf56b146589d84d919f2396c7fc12d8067c2fc3bbd62b5f67d6f34cc269d6c

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