Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea5f98b92714a5bc…

MALICIOUS

PDF

68.9 KB Created: 2020-12-17 00:44:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d9bf9b4b7711035abc0ff94f4bf3bf4 SHA-1: 6e21b4be462f685dddffd4d37ab715cbfd458655 SHA-256: ea5f98b92714a5bc8b7c28b4e33b21209e3cc6c9d7d403c0729b3881029bca6c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The 'SE_ADVANCE_FEE_SCAM_LURE' heuristic strongly suggests the document's content is designed to deceive users with fake lottery, prize, or parcel delivery schemes. The presence of numerous external links, including one to 'traffset.ru', indicates a potential attempt to redirect users to malicious sites or engage in link farming.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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/aws?utm_term=free+handwriting+sheets+ks1
    • https://dujizajep.weebly.com/uploads/1/3/4/7/134704211/c3ea0cad.pdf
    • https://musimisipamorek.weebly.com/uploads/1/3/4/5/134594646/1540357.pdf
    • https://wivixape.weebly.com/uploads/1/3/4/8/134897282/5462084.pdf
    • https://roxexiku.weebly.com/uploads/1/3/4/4/134445291/2480944.pdf
    • https://tamagokevalagir.weebly.com/uploads/1/3/0/7/130776783/2a2b5b68590.pdf
    • https://pimitasemoz.weebly.com/uploads/1/3/4/6/134646318/849a6a5.pdf
    • https://xigokerurubupa.weebly.com/uploads/1/3/4/3/134312623/9186178.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf2153485235c868a99c2/1606283803299/46159652591.pdf
    • https://static1.squarespace.com/static/5fc5947b0b6b03258f5520ec/t/5fd67379d654060362ca4f11/1607889787378/dulus.pdf
    • https://static1.squarespace.com/static/5fc0f7235687f52b6b817f64/t/5fc3c427cb3e0f5771c30060/1606665257054/70584327318.pdf
    • https://static1.squarespace.com/static/5fc3bce8a13a450bab05ef87/t/5fcadf20b495bd202815e11d/1607130912956/98263091897.pdf
    • https://s3.amazonaws.com/tezofuretejom/lloyd_lester.pdf
    • https://static1.squarespace.com/static/5fc541af24b06a7eb31c2be5/t/5fd68e5913a48350e819394a/1607896667129/e_mitra_portal_section.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5b3.bin
3e5b14ed43ec9fbbd0dc63d5988eec8684776191066a18224f9d5dc7333f8035		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5B3 4896 bytes
font_01_sfnt_off0000d661.bin
04c33655102c3f44b681493507101be85071d71dea876f2458b1e3b9f160037e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD661 10116 bytes
font_02_sfnt_off0000f903.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF903 4324 bytes

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