Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aae9f31ad784dd4…

MALICIOUS

PDF

68.4 KB Created: 2021-02-10 18:59:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 02f599ce1797f1a72ebd11307539181a SHA-1: 130be4e590f85fc9de7f1046ff0216a0b0da1d47 SHA-256: 2aae9f31ad784dd480baaecdc1f3a7f8c51d3acb091667bd4b0b2a018de3ae4c
194 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous external URLs, suggesting a phishing or spamming campaign. The heuristic 'SE_INVOICE_LURE' indicates the document's content is designed to mimic an invoice or payment request, likely to trick users into clicking the malicious links. While no scripts were explicitly extracted, the presence of external links and the phishing lure strongly suggest an attempt to redirect users to malicious sites, potentially for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://jottigo.ru/wb?keyword=auto%20repair%20order%20forms PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4401989/normal_5ff7eff661732.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453335/normal_601d01bd4f3a7.pdfIn PDF document text
    • https://kafaziwe.weebly.com/uploads/1/3/1/0/131070109/nomagasotafilo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381547/normal_5fc7bff74e963.pdfIn PDF document text
    • https://tadadali.weebly.com/uploads/1/3/4/0/134095934/9262224.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465257/normal_601287b4a57a3.pdfIn PDF document text
    • https://nilazarokidimud.weebly.com/uploads/1/3/4/4/134495838/7463004.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415756/normal_6020a8863fdf9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450350/normal_5fd0b9e882637.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403684/normal_5fd1036fc45c6.pdfIn PDF document text
    • https://vepufekuso.weebly.com/uploads/1/3/0/7/130775624/kenevezebefawesud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366043/normal_600e35db7d61b.pdfIn PDF document text
    • https://wujibinofowe.weebly.com/uploads/1/3/1/3/131383737/deduso-fufawi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dulubuli.rf.gd/72281604387.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD028 5144 bytes
SHA-256: ed16a09197bcd3710dba4604960255b80c08a7a37d3768caff9ee2361139552a
font_01_sfnt_off0000e194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE194 10400 bytes
SHA-256: 616b03d8ce9788685f31efd8999aeb1cb4a5288d42b1d063fa6695d58ad2596c

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