Malicious PDF — malware analysis report

Static analysis result for SHA-256 396c2d61567428fd…

MALICIOUS

PDF

73.7 KB Created: 2021-01-03 13:44:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: c6a2fb8cdad3398b4b8851b29f04dd0b SHA-1: 1c5a991c2310aa4df071b64a30671dbfa1baec51 SHA-256: 396c2d61567428fd5bdcad707e0e5b9d81c0afaf79482db8435b4506c3b99f28
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically identified as a malicious redirector. The ML classifier and ClamAV also flagged this file as malicious, indicating a phishing or malicious content distribution attempt. No scripts were extracted, but the presence of numerous links suggests a drive-by download or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://traffmen.ru/aws?utm_term=laser+cut+wedding+invitations+templates+free In PDF document text
    • https://static.s123-cdn-static.com/uploads/4486969/normal_5fe1210ab1c0f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385206/normal_5fef0ced14cd8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409238/normal_5fcc6f94f3f38.pdfIn PDF document text
    • https://vuxarujetununo.weebly.com/uploads/1/3/4/4/134437765/fonamagexesaxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458421/normal_5fa8a0b3b042f.pdfIn PDF document text
    • https://nogafuku.weebly.com/uploads/1/3/2/8/132815296/4871693.pdfIn PDF document text
    • https://fuwofinirofen.weebly.com/uploads/1/3/1/6/131637723/waniwasal.pdfIn PDF document text
    • https://joxisewegiwazev.weebly.com/uploads/1/3/4/6/134669132/9aa9ac6f3e3.pdfIn PDF document text
    • https://sovuzozasofebod.weebly.com/uploads/1/3/4/3/134343281/b271e05651.pdfIn PDF document text
    • https://mirulunus.weebly.com/uploads/1/3/1/1/131164386/nugiwidotud-vibaluxew.pdfIn PDF document text
    • https://banodita.weebly.com/uploads/1/3/4/3/134311275/874e6f6c555cf.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/gogunabones/ac_milan_2005_squad_formation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf1f1023-e3f6-41ee-ab7f-7312617b863b/muslim_student_association.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/genumiwafudadusasuta.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/21094347810.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/ripipisuroz.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_off0000e20f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE20F 5568 bytes
SHA-256: 8198e16f443ba7a3dd9f6c676a6c5a911fd82f57658d891375b2cca515238e73
font_01_sfnt_off0000f507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF507 10812 bytes
SHA-256: 7992b93b1728df3723d1bad02edc07e5e59b9a86ce99f63f5096c0e6a2395d80

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