Malicious PDF — malware analysis report

Static analysis result for SHA-256 360fc0a95b746525…

MALICIOUS

PDF

73.4 KB Created: 2021-01-10 23:46:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c439efed204a16f33219a3807795dc4f SHA-1: 7a18d8ab47feb702e34419dd782f44c073531cc2 SHA-256: 360fc0a95b7465252aa262310efb309264707e56242e55f2f3f978235bb8a64d
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external links, with 'https://xigodawi.weebly.com/uploads/1/3/4/4/134464905/zigilotewitalizirek.pdf' being the first identified. Another external URI, 'https://trafftec.ru/123?utm_term=saludos+en+ingles+formales+e+informales', was also extracted. The document body contains garbled text, suggesting it is not intended for direct user consumption but rather to facilitate the link farm.

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://trafftec.ru/123?utm_term=saludos+en+ingles+formales+e+informales PDF link annotation
    • https://xigodawi.weebly.com/uploads/1/3/4/4/134464905/zigilotewitalizirek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378382/normal_5f976ab102fe9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408996/normal_5fa60a9a14726.pdfIn PDF document text
    • https://site-1197012.mozfiles.com/files/1197012/paviviwukugemaxirawiju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404133/normal_5fd26f13895f9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480886/normal_5febc23cb509a.pdfIn PDF document text
    • https://rasagarus.weebly.com/uploads/1/3/4/4/134452949/vesabuwibuj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426260/normal_5fc85ee0d530c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501995/normal_5fd060e6bc5f0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449172/normal_5fddf5c20dbbe.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/gifojuxaxeva/bravely_second_end_layer_3ds.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/akimichi_bed_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/lelazoviwawotavunadifo.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/fuvezepuneni.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/tirudowilaw.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/rewubarepijatidopuraj.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_off0000d189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD189 5132 bytes
SHA-256: c03271e2f12fd4dfc4439c3e863d883fa45b0d6393b681657a8ff1b94ce0bba5
font_01_sfnt_off0000e2d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D5 11512 bytes
SHA-256: c88e20c075b9c0ea311d8bb651bb3b8da7854e50b4ee145d9c83ffb3f3c07b50
font_02_sfnt_off00010866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10866 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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