Malicious PDF — malware analysis report

Static analysis result for SHA-256 7078ee2a31e15e88…

MALICIOUS

PDF

73.8 KB Created: 2020-11-23 14:05:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 38a50ca1ba27d2ffbeaeb2d01652c9fe SHA-1: de101c0ac4703bfe4f032dd03445e97d5056030b SHA-256: 7078ee2a31e15e8852fee7c8fca5219f9ee903ed5672e183fce17b2fee6bb7e8
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://gettraff.ru/strik?utm_term=la+historia+de+las+cosas+resumen+ensayo In PDF document text
    • https://gopogaxewose.weebly.com/uploads/1/3/4/0/134013169/7a3eeb5bc11f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377697/normal_5f8f2f89a62cc.pdfIn PDF document text
    • https://nepajomawowezuw.weebly.com/uploads/1/3/4/4/134462508/taleko.pdfIn PDF document text
    • https://monuwapomobi.weebly.com/uploads/1/3/4/7/134730240/d0947db8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387229/normal_5f9f10fc150c9.pdfIn PDF document text
    • https://vifesomojijafi.weebly.com/uploads/1/3/4/3/134337648/11724d6a1b.pdfIn PDF document text
    • https://pefuxagofir.weebly.com/uploads/1/3/4/3/134359429/kovevekaw_rinutopubapax_ketefivunegasuw.pdfIn PDF document text
    • https://mofesifejizovis.weebly.com/uploads/1/3/4/7/134749503/1966399.pdfIn PDF document text
    • https://mogazikazalag.weebly.com/uploads/1/3/4/4/134440800/redamu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471238/normal_5fba68f448299.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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_off0000d24e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD24E 5104 bytes
SHA-256: 69bdd63bb79df8dcbff8249dae5527c5e4ced97fa1810776f0b75bee8339a0a7
font_01_sfnt_off0000e384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE384 12104 bytes
SHA-256: 3069008037db0310ecfeee30e447ec18e4e5557247d4a36fa06b8d66ee6aab1b
font_02_sfnt_off00010aeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AEB 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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