Malicious PDF — malware analysis report

Static analysis result for SHA-256 c122eae6948dce0b…

MALICIOUS

PDF

75.6 KB Created: 2021-03-01 03:16:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ba68e51a4ad07b239e56d13f3fea41d4 SHA-1: eae11385c96491c8c9a6b77623f14a2eef62b3a4 SHA-256: c122eae6948dce0ba678bfb388edcc031c693cdc8acb39359b1e0632959642b5
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://botokaw.ru/aws?utm_term=where+to+watch+the+shining+free+reddit PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384160/normal_602b6be05a936.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471230/normal_6006c8da29492.pdfIn PDF document text
    • http://xikumidevulofo.iblogger.org/46119531145.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415748/normal_5fde00fd27ce0.pdfIn PDF document text
    • https://lokejarezuwomi.weebly.com/uploads/1/3/0/7/130776656/2436821.pdfIn PDF document text
    • https://lurexiji.weebly.com/uploads/1/3/4/5/134594132/454830.pdfIn PDF document text
    • https://lopamazaveseku.weebly.com/uploads/1/3/4/6/134643240/lujokipevo.pdfIn PDF document text
    • https://gobodozi.weebly.com/uploads/1/3/1/3/131398455/5e476ee918f18.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487918/normal_6001cf1c0038d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482858/normal_5fcd4343dee9a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421959/normal_5fe42a1ea37b7.pdfIn PDF document text
    • https://rivatuvimib.weebly.com/uploads/1/3/4/4/134469475/c8c0564becca2a.pdfIn PDF document text
    • https://pisixaxonazav.weebly.com/uploads/1/3/5/3/135394173/8357500.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418987/normal_5fd26c27651e1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fujukosis.epizy.com/barcode_scanning_software.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE253 5356 bytes
SHA-256: f80374dc85bcba15e7e948487379d0db2399c2628c737fb67400b8043629dac0
font_01_sfnt_off0000f49e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49E 14712 bytes
SHA-256: afd45c49ecf50c9bb3074c3294318977375869382cdf2a99a26de0a4b7fbf3e9

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