Malicious PDF — malware analysis report

Static analysis result for SHA-256 947007b4eecbd558…

MALICIOUS

PDF

72.5 KB Created: 2021-06-04 15:41:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4d5ea16d5f87759fa044d04b6213052 SHA-1: d6bf72736b0f14239578927089a807e0454685fb SHA-256: 947007b4eecbd558c00f32a141d0075fdb2ed6760ac15864b7b1def3bc08f22e
156 Risk Score

Malware Insights

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

This PDF document was identified as malicious by multiple heuristics and an ML classifier, specifically flagged as a phishing trojan. It contains a large number of external links, many pointing to PDF files hosted on various platforms, suggesting a link farm or redirection scheme. The document body, though heavily obfuscated, contains metadata related to its creation, and the presence of numerous external URIs indicates an attempt to direct the user to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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
  • 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://philabc.ru/pbw?utm_term=clasificacion+de+paralelogramos+segun+sus+angulos
    • https://static.s123-cdn-static-d.com/uploads/4405922/normal_60b528e805adb.pdf
    • https://kuxodebareku.weebly.com/uploads/1/3/4/0/134042390/donaxudele_zetilibob.pdf
    • https://zogazakuf.weebly.com/uploads/1/3/1/6/131636678/9eaeb3e.pdf
    • https://tavutapakewig.weebly.com/uploads/1/3/5/3/135399939/limoxazugu_xinupaxibisuki_milas_tonigapanu.pdf
    • https://cdn-cms.f-static.net/uploads/4382187/normal_6041973baa0af.pdf
    • https://sirawosoze.weebly.com/uploads/1/3/0/7/130776152/sezejizadiwowe.pdf
    • https://tozafutesaf.weebly.com/uploads/1/3/4/9/134900259/7149105.pdf
    • https://zogabugopevaluz.weebly.com/uploads/1/3/0/8/130814784/mezufusefe_zeligogesafi.pdf
    • https://static.s123-cdn-static-d.com/uploads/4374366/normal_60b44f8adc4c2.pdf
    • https://bafokaxaxex.weebly.com/uploads/1/3/4/8/134881351/2042616.pdf
    • https://jukirabupunux.weebly.com/uploads/1/3/0/8/130874410/1826510.pdf
    • https://cdn-cms.f-static.net/uploads/4471235/normal_60288269856a9.pdf
    • https://nuzunuge.weebly.com/uploads/1/3/5/3/135399682/e0dc5f04546.pdf
    • https://mabalajobiken.weebly.com/uploads/1/3/4/0/134016714/fd489b12b078d.pdf
    • https://cdn-cms.f-static.net/uploads/4499653/normal_5fd9c976700b1.pdf
    • https://genolawibiwiz.weebly.com/uploads/1/3/4/3/134316454/2815904.pdf
    • https://sifuzulujiw.weebly.com/uploads/1/3/4/7/134716539/jasumabejefav.pdf
    • https://static.s123-cdn-static-d.com/uploads/4367281/normal_60b59f190203b.pdf
    • https://cdn-cms.f-static.net/uploads/4422136/normal_602096a95aa5b.pdf
    • https://wobafedufuj.weebly.com/uploads/1/3/4/0/134012960/5190614.pdf
    • https://mituzeru.weebly.com/uploads/1/3/2/6/132681412/dukudurorexevo-nomejejat-dujapisevimon-logexodewigor.pdf
    • https://cdn-cms.f-static.net/uploads/4486193/normal_60372df6a5603.pdf
    • https://xonovezalewame.weebly.com/uploads/1/3/4/4/134489084/b2d6a7fae81d41b.pdf
    • https://kixatefibav.weebly.com/uploads/1/3/0/7/130776592/c2a90ab.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000db60.bin
5ccf8505468c7e76d48fbb82f4231341cbbacf8f563e4ff76b0ae3f46b98a985		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB60 5380 bytes
font_01_sfnt_off0000ed94.bin
db47c0710780ce4474138695e8e97600332809c71e613eab232c74aa60fab73c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED94 11156 bytes

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