Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9eb4c2cea4e1376…

MALICIOUS

PDF

67.1 KB Created: 2021-01-15 05:43:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: c8feb66111ee6157a43bb44658b43372 SHA-1: df1b1b37ad49e976075a4bd26c43626f8f83a24f SHA-256: e9eb4c2cea4e1376fb5dd635a09d75cefddf92b215df34d370f3e29b781d224d
244 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing or scam campaign, evidenced by numerous embedded links pointing to redirectors and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to lure users to external malicious content, likely for credential harvesting or malware distribution.

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://gettraff.ru/aws?utm_term=company+core+data+sheet+fda In PDF document text
    • https://xuxavapivobe.weebly.com/uploads/1/3/4/5/134590147/615409.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415537/normal_5fadc8c321fa6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449627/normal_5fc5e40a8199c.pdfIn PDF document text
    • https://boxesagako.weebly.com/uploads/1/3/4/5/134589877/xepaka.pdfIn PDF document text
    • https://site-1188059.mozfiles.com/files/1188059/secret_of_margrave_manor_walkthrough.pdfIn PDF document text
    • https://bumewotosebixab.weebly.com/uploads/1/3/5/2/135298585/pukunowexine.pdfIn PDF document text
    • https://lakafoxure.weebly.com/uploads/1/3/4/2/134266374/1149703.pdfIn PDF document text
    • https://derigogo.weebly.com/uploads/1/3/4/0/134017063/getetatipil-fefaxirofase.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376875/normal_5f8ba22f36b8a.pdfIn PDF document text
    • https://vevinobe.weebly.com/uploads/1/3/4/4/134487659/c52f5104.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
    • https://s3.amazonaws.com/ragejufa/xovivofudawa.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/region_champagne_ardenne_formation.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_off0000c022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC022 5228 bytes
SHA-256: 5f439fb9edb89cdd362377bce4e6013e7aea3d3f40d9e055fbe61b803cb7d54b
font_01_sfnt_off0000d1b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B5 9260 bytes
SHA-256: c0532a3cf6ab134023e3da9f353a7800f4985bfb7bcaae62c302716ade732b30
font_02_sfnt_off0000f175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF175 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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