Malicious PDF — malware analysis report

Static analysis result for SHA-256 f24044087f21daca…

MALICIOUS

PDF

71.5 KB Created: 2020-11-26 15:38:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 74abbcf16ab9c9358ea188b15da7f971 SHA-1: d31da146f8a83db1201a0bc8e201d4ef5e4a159a SHA-256: f24044087f21daca729fc87f90d6b6b4fa9e8a0a0205a2134c95f8b40226f55c
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The document body, though heavily obfuscated, appears to be a police report, a common lure for phishing. The presence of external URIs and the ML classifier's high confidence score indicate malicious intent, likely to redirect users to malicious websites for credential harvesting or further malware delivery.

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://trafffe.ru/aws?utm_term=hialeah+police+department+police+report PDF link annotation
    • https://lupigufenof.weebly.com/uploads/1/3/4/5/134509144/pubum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369762/normal_5f8e8e4aa5a4f.pdfIn PDF document text
    • https://rutukesusejam.weebly.com/uploads/1/3/4/4/134464581/mogatinufenewog.pdfIn PDF document text
    • https://lowizozexide.weebly.com/uploads/1/3/0/7/130776176/wedakixutapan.pdfIn PDF document text
    • https://roxilegetewus.weebly.com/uploads/1/3/4/7/134721251/miguzusof.pdfIn PDF document text
    • https://tojaluteder.weebly.com/uploads/1/3/4/3/134384479/zewedifagukek.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/76c30d49.pdfIn PDF document text
    • https://zetizisoxaw.weebly.com/uploads/1/3/4/4/134498522/ff99451.pdfIn PDF document text
    • https://nijubalalo.weebly.com/uploads/1/3/1/4/131453980/a50435d32.pdfIn PDF document text
    • https://meboguvogo.weebly.com/uploads/1/3/1/4/131437667/1437215.pdfIn PDF document text
    • https://ridawixesij.weebly.com/uploads/1/3/4/6/134660161/dabodinigidivaz.pdfIn PDF document text
    • https://dujinagipufamod.weebly.com/uploads/1/3/4/5/134587046/631726f1d30f.pdfIn PDF document text
    • https://timelasabo.weebly.com/uploads/1/3/4/3/134345700/sizek_pitotuzetiraki_poxov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kavalukato/5344985968.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/words_that_start_with_gener.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/tumoperuxap.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/subarachnoid_haemorrhage_management_nice_guidelines.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD2F 4884 bytes
SHA-256: d08c9f4c87d9e5c11500f9845f379899d028b4fbf68b02611ac2bb26673dbf4d
font_01_sfnt_off0000dd8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD8C 10860 bytes
SHA-256: 8460bc0a179934a4d430e4732a68e5ca34e01daa06a9677b6a15405e2410f71b
font_02_sfnt_off000102bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BF 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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