Malicious PDF — malware analysis report

Static analysis result for SHA-256 106c327c689846d8…

MALICIOUS

PDF

107.2 KB Created: 2021-03-30 02:34:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1af1dc9a5c9d1b05c4c67b719f389660 SHA-1: 5295904a463f5bf3a44ff3787afb874882b2c1cd SHA-256: 106c327c689846d8bb16a31854b790d3133a84d8a3ee6c0404493e57dc4a430e
186 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. Specific URLs and indicators for this sample are listed in the indicators section.

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://xezojetit.ru/strik?utm_term=way+up+in+the+middle+of+the+air PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454671/normal_603136185b9a5.pdfIn PDF document text
    • https://vevuduwas.weebly.com/uploads/1/3/0/7/130775740/zojopobajadebofuba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466370/normal_60579972c6bde.pdfIn PDF document text
    • https://mosezusimoz.weebly.com/uploads/1/3/1/6/131637881/zesifuzi.pdfIn PDF document text
    • https://zuzumesagodufen.weebly.com/uploads/1/3/2/6/132695194/6783945.pdfIn PDF document text
    • https://bifitulodagox.weebly.com/uploads/1/3/6/0/136081839/f12ff04ec1f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391335/normal_5fe8b1e19d5ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459935/normal_604af4dd652e9.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/f14b1835-6cc5-4e00-9648-370759ee008b/9_quality_standards_explained.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3377899d-b2b7-4e46-a773-1a9eeaf658c2/vifere.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60f7022c-270c-440c-890e-16c0beb3ec4a/monarch_lathe_models.pdfIn PDF document text
    • http://salajire.onlinewebshop.net/24831508863.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/xituvipexeza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d5ebf77-eb82-4ba4-afc6-c9de05cc99df/97242674303.pdfIn PDF document text
    • http://vakogez.myartsonline.com/15842785053.pdfIn PDF document text
    • https://s3.amazonaws.com/fadobirak/xopijenusuxufiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c2f1ef9-18d4-4429-9eb9-e12520aa1c6b/lutofopawotifa.pdfIn PDF document text
    • http://tudixuzaw.onlinewebshop.net/41645860557.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_off00016474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16474 5216 bytes
SHA-256: 3e034f85f54030a2a579e97dda003407fad7c34a47432c0c76380db671c07ef8
font_01_sfnt_off0001761e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1761E 11640 bytes
SHA-256: 7281a840c7fc4e5bbf80724ff1ac797501724e9d35f8ea657204ad122f884a6c

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