Malicious PDF — malware analysis report

Static analysis result for SHA-256 a032a9d7bb585868…

MALICIOUS

PDF

71.4 KB Created: 2020-12-16 11:53:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 2364177b217d00fd798a80c0aa0eb658 SHA-1: ebecf98646e128015a87e118f4fe3a1f4c375683 SHA-256: a032a9d7bb58586873ad8f9fd94243f897bb4fca560dac8e46e96545e899534a
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, identified as a link farm and a malicious redirector. The primary malicious URL is 'https://traffking.ru/wb?keyword=book%20citations%20mla%20format', which is likely used to distribute further malware or conduct phishing. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/wb?keyword=book%20citations%20mla%20format In PDF document text
    • https://cdn-cms.f-static.net/uploads/4415742/normal_5fadacaa3d235.pdfIn PDF document text
    • https://xufidevudog.weebly.com/uploads/1/3/4/3/134389214/zobepajitisezatu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414701/normal_5f9b8f75b8da1.pdfIn PDF document text
    • https://sugulidan.weebly.com/uploads/1/3/4/5/134508933/butuxurezelibuvalur.pdfIn PDF document text
    • https://xogexemufak.weebly.com/uploads/1/3/1/4/131437987/4afc61058b.pdfIn PDF document text
    • https://mefupajudeto.weebly.com/uploads/1/3/4/8/134883840/sakotizefuzifagiwoz.pdfIn PDF document text
    • https://sejabekozifox.weebly.com/uploads/1/3/4/2/134266090/savazatite.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403938/normal_5fca2e1329a3f.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/wudibirewuduto/79173746698.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68d2b0b5-dce5-405f-9ba1-4c27b598786f/talipizugelixafidob.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/pekubiledo.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/car_starter_motor_wiring_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/xumitoxebularewijo.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/instagram_highlights_template_photoshop.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_off0000dc4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC4D 5140 bytes
SHA-256: 8ce0b894a144661189dbe3f4e146a91f916796eb56518cb72bf4572dfdfcb7c0
font_01_sfnt_off0000edba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBA 10376 bytes
SHA-256: 485ca2cede84dfb5287c994533ee3981f53f9e34e44b85141b308fdec5a21e80

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