Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c7e9462fcd0c092…

MALICIOUS

PDF

71.4 KB Created: 2020-11-26 04:17:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 90b0fb9c215f175b85f84ad6ae59ee5e SHA-1: 9792cff97c64879112c90e984e58c3ec15b3e5cc SHA-256: 0c7e9462fcd0c09268763d68b29df27a85de33a59477f2e0c554ed3d246cb67b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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/strik?utm_term=ana+maria+estupi%25C3%25B1an+esposo PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4480387/normal_5fa905e02fb33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446272/normal_5f9e06c9657fe.pdfIn PDF document text
    • https://kedixezowudogaj.weebly.com/uploads/1/3/4/6/134618790/1128752.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/filosom-lusiwikafese-jerupuxorukoti-novubolifunuw.pdfIn PDF document text
    • https://kesevaze.weebly.com/uploads/1/3/1/3/131383297/kujeluso-rujuporixotem-puzadabe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385853/normal_5f9e206f8f315.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471971/normal_5fa42b8735cd3.pdfIn PDF document text
    • https://sijevunima.weebly.com/uploads/1/3/1/8/131859613/3d263c1ca.pdfIn PDF document text
    • https://walasopi.weebly.com/uploads/1/3/4/5/134588780/2068505.pdfIn PDF document text
    • https://savakofanedekin.weebly.com/uploads/1/3/4/8/134872369/ee99d494.pdfIn PDF document text
    • https://bizetuxerupa.weebly.com/uploads/1/3/0/8/130873791/550162d5.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/popagexexoza/javexitib.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/30244350311.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/25330224616.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52d26553-3ad1-463d-92c7-ac6f58759f3d/jesuvata.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/wakafogedugudaduxukibe.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/their_eyes_were_watching_god_symbols.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_off0000c96d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC96D 5016 bytes
SHA-256: 29e5f1c32478b06fc362aa2f2711250d744b40e3bb10f918e82062cae7943214
font_01_sfnt_off0000da14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA14 11816 bytes
SHA-256: cec6bd12e398538973d73315ff963c83a2bd6639a0d7830a99cbfefa0e48202b
font_02_sfnt_off0001008e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1008E 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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