Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b60b240435f285e…

MALICIOUS

PDF

74.9 KB Created: 2021-03-20 05:40:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 9501b8ed2d7221b4d7a16bbf1c4d9445 SHA-1: c8c3b44edc22182c8974f6c89dd64222c2861e9b SHA-256: 9b60b240435f285e7ba2e792a8ae81dc354d6e113601f6fcaff62b574b0581dc
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous embedded URLs, with one prominent URL pointing to 'dugedepap.ru' which is likely part of a phishing campaign. The document body, though heavily obfuscated, contains text related to pricing and installation, reinforcing the phishing pretext.

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 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.
  • 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=price+of+generac+installed PDF link annotation
    • http://pet-guru.shop/buperazasufazalafefizbuxnw.pdfIn PDF document text
    • http://ejqy.com/el_amor_debe_ser_firme_james_dobson_gratis7e1mf.pdfIn PDF document text
    • https://cdn.sqhk.co/zejejofe/KjiDlgi/zombie_shooter_games_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473030/normal_60045b4b9b64f.pdfIn PDF document text
    • http://juluzenaluziwo.22web.org/99662024392.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368246/normal_602264617968f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461495/normal_604922b6b526d.pdfIn PDF document text
    • https://cdn.sqhk.co/ridijafugemi/jfheidL/xefowurajunadukejapineve.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://milodip.epizy.com/sibopufanaliso.pdfIn PDF document text
    • http://fizuvofodiku.epizy.com/books_in_the_michael_vey_series.pdfIn PDF document text
    • https://04a80c79-134c-446e-801b-0c1635678e59.filesusr.com/ugd/5cebf8_3b1783f1c60345e88c39aecd675c2fb8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/71a3d7f9-812a-4b2a-af8b-c219f4cf3025/53095642453.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69e133aa-e495-4e43-8bd7-528f01f657fa/66883645137.pdfIn PDF document text
    • https://e4da1597-3bb3-488b-9226-7c2c9e06e9ce.filesusr.com/ugd/db5d73_803015107d2b41edb50932801655ab1c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/52003a8e-c3e0-4fc0-bd71-ee45d9bfe669/can_you_put_bubbles_in_a_foot_spa.pdfIn PDF document text
    • https://b4140449-9b96-4148-8619-c9b3eed7b48c.filesusr.com/ugd/c33cdb_5becf365de464604adc9d0851a156433.pdf?index=trueIn PDF document text
    • https://8f20b4bd-83f7-4a55-8c6f-e9501e2e061c.filesusr.com/ugd/c1c462_4d8b8def8c16408aa96e8576c05194d8.pdf?index=trueIn 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_off0000e7e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E3 5192 bytes
SHA-256: 0ed72b6a57ac0925b2949d355f6434d9d911e6029c7449becbd7b8550f4a8e0a
font_01_sfnt_off0000f99c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF99C 10932 bytes
SHA-256: 4f4cff238f9ef2afb0a730cbb8a7c809fb63ce8c8ae01b4eebe35edff6c94b25

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