Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ccf287eb7ee6b28…

MALICIOUS

PDF

65.2 KB Created: 2020-12-21 18:43:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 3746193355a58f2e41c6da62a5febe50 SHA-1: 232c8ce6604f05a718b36a8c544d1e3f3f335705 SHA-256: 9ccf287eb7ee6b2834bce65772966343994105753d223d4cadc4a117d140ab4f
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document's content, though heavily obfuscated, appears to be a lure related to an audit report, directing users to external URLs like 'https://traffking.ru/aws?utm_term=icai+audit+report+format+fy+2018-+19'. No scripts were extracted, but the PDF structure itself is used to host and present these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://traffking.ru/aws?utm_term=icai+audit+report+format+fy+2018-+19 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409420/normal_5fa6516ecdc02.pdfIn PDF document text
    • https://legifufase.weebly.com/uploads/1/3/4/3/134349809/kunum_lukuxewig_fijaxuwolapujox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365563/normal_5fe0760511aad.pdfIn PDF document text
    • https://niwejeru.weebly.com/uploads/1/3/4/3/134308800/nixitegilamije.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467593/normal_5fb50a224b323.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471960/normal_5fa8e88a7ba2e.pdfIn PDF document text
    • https://lulunanozox.weebly.com/uploads/1/3/4/5/134598725/wirufijag.pdfIn PDF document text
    • https://sakotitalivuvu.weebly.com/uploads/1/3/4/8/134887700/guvanira.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472484/normal_5fca8c5c0251b.pdfIn PDF document text
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/bazarerin-surilugajexu-jusibut-jopaxig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6356d7f8-96c3-4565-a8a9-852c75626f54/dokaviwuvefatunavajef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cda286b5-b984-4908-ace7-7193189934c6/mulazizuluditumivimaja.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c1aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1AA 5840 bytes
SHA-256: 099cb6445e0d6cdff149a5ad8bdfa4bf6d5596892eaff8681aeec8397eb342a5
font_01_sfnt_off0000d591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD591 10160 bytes
SHA-256: e6e160bf2edac1d0c5f9e08c31355449000d8ab4a1a7c9227e0e85ecbf95f9aa

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