Malicious PDF — malware analysis report

Static analysis result for SHA-256 52c306c0e238d182…

MALICIOUS

PDF

78.1 KB Created: 2020-11-14 10:15:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 665328664277499c5670eaf807bc68e5 SHA-1: 1c7a28a17571d58eae627505827e37ccca35b2f7 SHA-256: 52c306c0e238d182050947a3f9f59a256cedea22f3c51c44fb77f719c87cf349
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting an attempt to direct users to malicious websites. One such URL, 'https://trafffi.ru/123?utm_term=alicia+keys+braids', is embedded within the document. The ClamAV detection and ML classifier further indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafffi.ru/123?utm_term=alicia+keys+braids PDF link annotation
    • https://nazivuwe.weebly.com/uploads/1/3/4/4/134452961/jabuparonurof_piziluzesufosil_vefofi_lipejabegepeleg.pdfIn PDF document text
    • https://gijakumode.weebly.com/uploads/1/3/4/3/134306186/ziluvutixigag_borojukuri_jisewedegefiz.pdfIn PDF document text
    • https://gogozugibijom.weebly.com/uploads/1/3/4/3/134369614/litexuvaze-livuka-tebalema-dewodujikik.pdfIn PDF document text
    • https://turamidiwirak.weebly.com/uploads/1/3/4/3/134340523/c513d9aee17.pdfIn PDF document text
    • https://damijuvik.weebly.com/uploads/1/3/1/3/131381376/voredovan_waliwineviwego_monukisarifoso_bomilisu.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/5184748.pdfIn PDF document text
    • https://zasesitezo.weebly.com/uploads/1/3/3/9/133986829/luzibidasegafu-metojirul-vupovutevav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nokiva/3125562065.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1854e288-3c39-486e-adc6-5ef6acc98560/55488170653.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/75176418975.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faa821d7-b895-489c-8f70-4e90f40336fa/sawatadotiwivixor.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/english_to_french_dictionary_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/778d15a4-0b62-4430-984c-9f8b5e1355c3/katisevup.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/defense_industrial_base_report.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/zepananimipapotor.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A4 5228 bytes
SHA-256: 422b2cb8351c079905abb044f76468b37c7ea7e8638d7937bde38fad12893385
font_01_sfnt_off0000e278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE278 3488 bytes
SHA-256: 40952b0e5ffd7f880a9eefc95b4db023c005175c09ab89ac9f7a6dd40e782cb4
font_02_sfnt_off0000f07c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07C 10564 bytes
SHA-256: 76160ed630f63ff8de0ff9da11966f3a398508d485b9dd522d0565beb6dc77d3
font_03_sfnt_off000114da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114DA 16460 bytes
SHA-256: a3a57f2a32008fbbcd3f688685d6d4e899dfeb276a44235cbaa074f6d58e4cd7

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