Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7ebd26e3409c339…

MALICIOUS

PDF

75.1 KB Created: 2021-02-15 21:46:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: bd827b5f55219bc9d27c162aae7db093 SHA-1: 044e67fd6317121223a1696beaebfe455b33ec4c SHA-256: e7ebd26e3409c3393897309a8094d5a116451f03eb83d19f1a643d013c4a2127
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many of which are hosted on dynamic DNS services or file-sharing platforms, suggesting a link farm or phishing campaign. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent. The embedded URLs likely lead to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/123?utm_term=make+my+own+website+from+scratch PDF link annotation
    • https://cdn.sqhk.co/fakupavod/jdgfjju/31849897509.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454280/normal_5ff589f94a2b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401558/normal_5fe175460eeb7.pdfIn PDF document text
    • https://jerigarapo.weebly.com/uploads/1/3/5/3/135327201/negobufiwakow_gunasorararulu.pdfIn PDF document text
    • https://bokesaxigalul.weebly.com/uploads/1/3/0/7/130776824/fibivesegipob-nitilasabe.pdfIn PDF document text
    • https://wipuzene.weebly.com/uploads/1/3/5/9/135971348/95702.pdfIn PDF document text
    • https://pewarefat.weebly.com/uploads/1/3/4/3/134361746/wasikomej-sizawijifawan.pdfIn PDF document text
    • https://cdn.sqhk.co/rokajoten/icuihgg/jebutowojija.pdfIn PDF document text
    • https://mubonunegaj.weebly.com/uploads/1/3/0/8/130874179/doberujawo.pdfIn PDF document text
    • https://cdn.sqhk.co/beratinuga/ghhxhjJ/vowere.pdfIn PDF document text
    • https://cdn.sqhk.co/xutazazo/ijcjghc/infinity_army_list_builder.pdfIn PDF document text
    • https://cdn.sqhk.co/dudumadopole/iC1FgfR/34203946844.pdfIn PDF document text
    • https://cdn.sqhk.co/gulifunanale/ijphea9/bein_sports_subscription_usa_cost.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471109/normal_5ffdf24501952.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopaji/idthcie/pac-_man_world_rally_psp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368244/normal_5ff29c0a9041a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454184/normal_5ffd9a2d09ef5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486983/normal_5fcceec8bef9d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE747 5492 bytes
SHA-256: 8c42c84dcc979648338c37fe06cdc6aee952105369fb9bbaf401e1eabfee7493
font_01_sfnt_off0000f9f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F5 10952 bytes
SHA-256: 62339ac27c2bc252f5e90dbb9ca5038936456776b057d5fe8ec220f8bbccace3

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