Malicious PDF — malware analysis report

Static analysis result for SHA-256 10a4228badcdafed…

MALICIOUS

PDF

76.9 KB Created: 2021-02-28 02:40:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a0a882511de85ab748075e026c3041db SHA-1: b750b4763856034d34f6a45ed13e4324ddf58068 SHA-256: 10a4228badcdafed35144831ad56367d69319edb6dd3ddf910a03a068aea9cf5
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing lure, specifically using a 'Dota 2 quest guide app' theme to entice users. It redirects to a suspicious URL, 'https://fokemale.ru/wix?keyword=dota+2+quest+guide+app', which is likely part of a phishing campaign. ClamAV detection further confirms its malicious nature as 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wix?keyword=dota+2+quest+guide+app PDF link annotation
    • https://cdn.sqhk.co/nodujugebi/iyUkB0N/lezuramim.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455174/normal_5fe2c1bf43033.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413112/normal_600ae618c9c03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371800/normal_600a1ce3d323c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495413/normal_5ffe7cd83a00c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458849/normal_5fde81261cc8e.pdfIn PDF document text
    • https://cdn.sqhk.co/kuruwoke/QgjXjqC/vasadipuwawugunaxozen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489834/normal_5fd29fc785f38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369764/normal_6031532dcbbf2.pdfIn PDF document text
    • https://cdn.sqhk.co/lovuzegonu/5MfGaeu/clash_royale_quest_chest_cycle_updated.pdfIn PDF document text
    • https://tapizijivuvol.weebly.com/uploads/1/3/2/6/132696465/guvirexibubox-goxoraw.pdfIn PDF document text
    • https://cdn.sqhk.co/busoleva/0IKzoYC/7170131014.pdfIn PDF document text
    • http://somixewavado.sportsontheweb.net/xetewixovijurepi.pdfIn PDF document text
    • https://fowaloxew.weebly.com/uploads/1/3/4/8/134881160/gabevofosikaf.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB7 5256 bytes
SHA-256: ac22c6c6cf6aec952c7ac77717dbfc67b2a4a1f9f66542fda96351bff92568e4
font_01_sfnt_off0000eead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAD 10184 bytes
SHA-256: abf6a1dd5114a0c659327b2efd99874dd7d58327db95caf705da8d7d5a8fc239
font_02_sfnt_off0001119f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1119F 16064 bytes
SHA-256: 1398bbf2dfd9cae4409d1d8ab67a79f495e147aa07cce54436be1c2862721d78

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