Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1510ff067b5878e…

MALICIOUS

PDF

81.8 KB Created: 2021-01-16 02:07:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4993ffe100b4cfbe4dcd4561368b302f SHA-1: 9423149bca0b515b624e3746632d8dfcd9f78110 SHA-256: e1510ff067b5878eeee33e6ad5ea733a16113c358cab2b194d32260fb03aeed7
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to disposable hosting services and are designed to appear as software downloads. The primary malicious URL, 'https://cctraff.ru/aws?utm_term=gangstar+vegas+mafia+games+mod+apk', is identified as a malicious redirector. The document's structure and link farm nature strongly suggest it's used for phishing or distributing further malware, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://cctraff.ru/aws?utm_term=gangstar+vegas+mafia+games+mod+apk In PDF document text
    • https://zizuralozirufu.weebly.com/uploads/1/3/1/4/131483034/7426507.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462374/normal_5fc4696c85855.pdfIn PDF document text
    • https://site-1177364.mozfiles.com/files/1177364/10554167334.pdfIn PDF document text
    • https://widijozitumude.weebly.com/uploads/1/3/4/6/134688085/6254779.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405930/normal_5f97839319b84.pdfIn PDF document text
    • https://cdn.sqhk.co/tosijoxopum/iNieTii/jakivuje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415950/normal_5f9d530590e80.pdfIn PDF document text
    • https://cdn.sqhk.co/pivokazi/ohetGKo/best_sound_equalizer_settings.pdfIn PDF document text
    • https://site-1168081.mozfiles.com/files/1168081/tusefiliwizakurit.pdfIn PDF document text
    • https://cdn.sqhk.co/titabofasika/fjjighd/19315718044.pdfIn PDF document text
    • https://site-1176351.mozfiles.com/files/1176351/font_britannic_bold.pdfIn PDF document text
    • https://cdn.sqhk.co/zujumatatub/Tyz9gf7/80113461732.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/mexavofezoxi/76163302853.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF55 5484 bytes
SHA-256: 9f62dce98a4023727e336f1febbdae1b44d0954047329e5ab4ea18e6381e8286
font_01_sfnt_off000101f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F8 5056 bytes
SHA-256: ebb277a2a9fde5a32f3b4c310319fb3568b4f3fd63645dc9e3dd67f6574d7ebe
font_02_sfnt_off0001143d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1143D 11256 bytes
SHA-256: d9f7c9efaa2968b41c3a659e34203d16e1afb934098dbdde2ea807e5599d4fe5

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