Malicious PDF — malware analysis report

Static analysis result for SHA-256 5432d615aeb26d40…

MALICIOUS

PDF

67.0 KB Created: 2020-12-15 23:49:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ebe7d695bec07bc2d13c0ba67069b5b SHA-1: d12e7e8f8a447b4b4769ccfdbcb30deeaeff9eb3 SHA-256: 5432d615aeb26d40d70b91b19b9e1d4d04b33c117dc214bae0c38393d86f699b
254 Risk Score

Malware Insights

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

The PDF contains a lure related to a jail inmate search, which is a common tactic for advance-fee scams. It embeds numerous links, including one to a known malicious redirector, suggesting an attempt to direct users to phishing or scam pages. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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/123?utm_term=clayton+county+jail+inmate+search+missouri
    • https://cdn-cms.f-static.net/uploads/4476443/normal_5fb5b22a94ad6.pdf
    • https://vakesefujes.weebly.com/uploads/1/3/0/7/130739027/1862494.pdf
    • https://cdn-cms.f-static.net/uploads/4366400/normal_5fa35ac5788f7.pdf
    • https://cdn-cms.f-static.net/uploads/4376404/normal_5fad405445093.pdf
    • https://cdn-cms.f-static.net/uploads/4504568/normal_5fbee862b5033.pdf
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/nojof.pdf
    • https://static.s123-cdn-static.com/uploads/4488316/normal_5fcaa3902c46f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zabevog/10158708801.pdf
    • https://uploads.strikinglycdn.com/files/bccac4e1-0cf3-4de0-913c-a0010f6b9ec2/latixogigazomovibar.pdf
    • https://uploads.strikinglycdn.com/files/51ea58fc-ce94-4d0f-8cbd-5f12e30dd07a/38130301801.pdf
    • https://static1.squarespace.com/static/5fc5a5842bbd74065826defa/t/5fd1bdafc10336458b3665b6/1607581103939/arizona_lottery_scratchers_tips.pdf
    • https://s3.amazonaws.com/dujepav/88845041634.pdf
    • https://s3.amazonaws.com/zukogi/the_entrepreneur_s_guide_to_business_law.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c968.bin
e567b6d244fb80e8259815c4334c7a86edf62746fd0c5caf327b678b93b6c5cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC968 5124 bytes
font_01_sfnt_off0000daad.bin
ff049e8dd6fbc2b45ab4d474e9cf1496f5fe8e2ba4b796ad88302b297e37e9b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAAD 10704 bytes

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