Malicious PDF — malware analysis report

Static analysis result for SHA-256 7536bd0b2e1b2926…

MALICIOUS

PDF

77.1 KB Created: 2021-05-28 18:46:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7530a0c99cee70bad088335fab7bde62 SHA-1: be69a9fa96b155454be8c8f43f32d0265eedba73 SHA-256: 7536bd0b2e1b292673a5d4d08cc6c0898c73df024d1d548145ba09734f299f46
226 Risk Score

Malware Insights

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

This PDF document is classified as malicious and exhibits characteristics of an advance-fee scam, using lures related to lotteries, prizes, or parcel deliveries. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially malicious sites. The embedded URLs and the heuristic firings strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://kuzutuzo.ru/strik?utm_term=is+miraculous+ladybug+on+disney+plus+in+order
    • https://lapefobok.weebly.com/uploads/1/3/4/6/134663543/rogikezotelid.pdf
    • https://nazafusi.weebly.com/uploads/1/3/5/2/135297870/perupufe.pdf
    • https://gokejaxax.weebly.com/uploads/1/3/6/0/136056436/a5d276c7bab.pdf
    • https://cdn-cms.f-static.net/uploads/4460060/normal_603d1f2bed3c2.pdf
    • https://nabumeludofava.weebly.com/uploads/1/3/4/3/134373896/c45469d2814.pdf
    • https://bazitakitavame.weebly.com/uploads/1/3/5/3/135394276/jamafapuloragiko.pdf
    • https://static.s123-cdn-static.com/uploads/4403428/normal_5ff76480e19c1.pdf
    • https://static.s123-cdn-static.com/uploads/4370263/normal_5fcb4878366ca.pdf
    • https://cdn-cms.f-static.net/uploads/4368954/normal_60632f6a1ddac.pdf
    • https://static.s123-cdn-static.com/uploads/4486354/normal_5ff25cd714a29.pdf
    • https://pulivaxudifosaj.weebly.com/uploads/1/3/4/2/134235984/zavadok.pdf
    • https://nugekiva.weebly.com/uploads/1/3/5/3/135322430/tawefaxiwiwiv.pdf
    • https://kifakujokaw.weebly.com/uploads/1/3/4/7/134709271/a0651b.pdf
    • https://paxepogemikut.weebly.com/uploads/1/3/5/3/135316128/67dce8.pdf
    • https://visumosibe.weebly.com/uploads/1/3/0/8/130814065/4837738.pdf
    • https://lidimegofomizut.weebly.com/uploads/1/3/1/3/131380930/490da95.pdf
    • https://koreluluzoma.weebly.com/uploads/1/3/5/9/135972167/852198.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e6395352-0365-4738-a7ea-dd6004c534d0/savefuxo.pdf
    • https://uploads.strikinglycdn.com/files/f217a466-a582-4801-9d4e-7e67d3af8e89/fluke_337_spare_parts.pdf
    • https://uploads.strikinglycdn.com/files/c28a2b5d-41c9-4fe8-a572-df152a2aa076/gulomekejutufid.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_off0000ea2e.bin
4524f0ad1d062033a8788cde939106b779803cf05802c975ed3f37404323e32b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2E 5572 bytes
font_01_sfnt_off0000fd08.bin
49749ec7a257af8e5685db06d9345b00779a1a74457a80ccb189e2b976187048		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD08 11776 bytes

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