Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fd124601c40ff33…

MALICIOUS

PDF

75.9 KB Created: 2020-12-15 18:17:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 7875c52df16beb451ccf1b133f79d7e8 SHA-1: 91e547bf122723c4f543940493ca38c171e1b3f5 SHA-256: 2fd124601c40ff3314ea0aa95c9ce24b66dafd7c9a34b519d0c2bbe7fe6b38dd
194 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing lure, indicated by the 'SE_INVOICE_LURE' heuristic and the presence of numerous external links, many hosted on disposable domains. The primary URL, https://traffset.ru/123?utm_term=cost+of+goods+purchases+periodic+system, suggests a redirection to a malicious site. The ML classifier strongly flags this PDF as malicious, and ClamAV detection confirms its threat.

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://traffset.ru/123?utm_term=cost+of+goods+purchases+periodic+system PDF link annotation
    • https://dapadode.weebly.com/uploads/1/3/4/6/134646205/tijaboraduridajejin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422622/normal_5f9bf06c23d80.pdfIn PDF document text
    • https://juvirafiwak.weebly.com/uploads/1/3/4/3/134307718/lomewupovuw.pdfIn PDF document text
    • https://rakonudiboxenej.weebly.com/uploads/1/3/4/8/134874851/rexisisogewene.pdfIn PDF document text
    • https://nixagefikaka.weebly.com/uploads/1/3/4/7/134741736/badeziwaka.pdfIn PDF document text
    • https://niboxevukok.weebly.com/uploads/1/3/4/6/134649508/7826466.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/2d7adc.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/ef26000e-cd19-4fc2-91fd-42bfa933ae53/rozikogefojalaxovo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c01527d2-d55f-4b4d-8f25-b9f5ce193fb3/ledaxexog.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/79712681145.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/baf70fa1-8acb-4fae-8e8b-1cc0f52c4ab7/ninexasifesibimow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a990b50-f760-4f6b-8ebf-19a521ec1c6a/63000096565.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07a8ee2f-3615-4acc-8c6e-fa1e97c17e57/dozubame.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/50439827916.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3194f2c9-2f36-41be-ae3c-88e77591977d/14531561388.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_off0000ec7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7C 5544 bytes
SHA-256: 4e970b411667f50e580cd766ccd08814a71f8363f11c86a55507dfc63365b843
font_01_sfnt_off0000ff3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3A 10476 bytes
SHA-256: 49504fed7877d9957211d3e702a689185c5b2430b6d6e0306d5c57d6d20d5053

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