Malicious PDF — malware analysis report

Static analysis result for SHA-256 47e95f3c118e728c…

MALICIOUS

PDF

77.6 KB Created: 2020-11-21 22:12:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c97f7ea4078998fe8677b6689fae8248 SHA-1: 63c3cef34f1628615ed957a45a81742eb981ef6c SHA-256: 47e95f3c118e728cc2fc9fd91474b5e9c7dd1e2d258893a39d40f53f63468cd2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many pointing to potentially malicious domains, indicating a link farm or distribution mechanism. ClamAV and ML classifiers identified this PDF as malicious, specifically a phishing trojan. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' strongly suggest the document's purpose is to redirect users to malicious content, likely for phishing or malware distribution.

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://traffset.ru/123?utm_term=effingham+high+school PDF link annotation
    • https://siwelarip.weebly.com/uploads/1/3/4/6/134682307/boriveroxiguzuxopi.pdfIn PDF document text
    • https://tufiganifipira.weebly.com/uploads/1/3/4/3/134310976/mobepu.pdfIn PDF document text
    • https://toxodapakaxoza.weebly.com/uploads/1/3/4/5/134525452/2137604.pdfIn PDF document text
    • https://kilesikawagex.weebly.com/uploads/1/3/4/3/134372597/mirofebisasowuwan.pdfIn PDF document text
    • https://satobolusiv.weebly.com/uploads/1/3/1/3/131398412/xunitex.pdfIn PDF document text
    • https://xilemuje.weebly.com/uploads/1/3/4/2/134265988/3408789.pdfIn PDF document text
    • https://xazebuwojij.weebly.com/uploads/1/3/4/4/134467588/2723593.pdfIn PDF document text
    • https://vakasuvarepem.weebly.com/uploads/1/3/4/3/134328097/jufulisufakap.pdfIn PDF document text
    • https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/84dfac.pdfIn PDF document text
    • https://betutinixe.weebly.com/uploads/1/3/4/4/134481053/petunujimab.pdfIn PDF document text
    • https://gixapogaruxa.weebly.com/uploads/1/3/4/3/134331356/4109441.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/48b36cad-1ce5-4850-a69c-84f2acfb7ae8/essentials_of_lifespan_development.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/2876082699.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c44f25f1-8a80-49ec-a752-78b8333a75f8/refund_a_gift_epic_games.pdfIn PDF document text
    • https://s3.amazonaws.com/wepeliniru/patumi.pdfIn PDF document text
    • https://s3.amazonaws.com/giwurode/51855630414.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/tales_from_the_yawning_portal_maps.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_off0000f131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF131 5156 bytes
SHA-256: 503c0445642ddd501a218157bbdf1cce12904a4a3fd9c1ddb4646cfab776a512
font_01_sfnt_off000102a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A4 11116 bytes
SHA-256: 89cb24a96fc63de8381f5e15b79e6df86191a0a97ac1b5a4a8af54a7a805db11

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