Malicious PDF — malware analysis report

Static analysis result for SHA-256 69061d10b87fa224…

MALICIOUS

PDF

99.2 KB Created: 2020-12-23 22:37:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 29a99a6f5b88e07415a7572280e04d83 SHA-1: 100a3809f75dcd3dd457ae130f67b1794abaec5c SHA-256: 69061d10b87fa2246f069d408252a107159f82bf93709ea9c3c23f61110f7a23
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, many of which point to other PDF files, suggesting a link farm or SEO poisoning tactic. One of the primary URLs, 'https://traffset.ru/strik?utm_term=swing+chair+with+stand+indoor', is likely used to direct users to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=swing+chair+with+stand+indoor PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476126/normal_5fd6ce85bd0cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369506/normal_5f87c92c91e18.pdfIn PDF document text
    • https://pepisukuwen.weebly.com/uploads/1/3/1/6/131606293/924405cb8ca788a.pdfIn PDF document text
    • https://solovetimu.weebly.com/uploads/1/3/4/8/134879252/gidefif_sotaz_bewilemabov_mivasomuxofu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412170/normal_5fb2deb15ee2e.pdfIn PDF document text
    • https://cdn.sqhk.co/guletema/VGjaJm8/44689745398.pdfIn PDF document text
    • https://cdn.sqhk.co/dozirolizilu/wgghhgj/superbike_racing_calendar_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474739/normal_5fa687422aecb.pdfIn PDF document text
    • https://balomizulo.weebly.com/uploads/1/3/4/7/134708572/rebazijababef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392474/normal_5f97abaa5734a.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/risisipajole/fabuwuwenagewikusupi.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_off000120b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120B9 5032 bytes
SHA-256: ba46489adf35f570a2ff7896697e0dcc293eb303a3500de87ebe63a258a1d8e1
font_01_sfnt_off000131c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131C5 10372 bytes
SHA-256: ea1bcb404b2a97cac094e78a71206db9dc3e10fdc39f501edcf0805a6d3f738d
font_02_sfnt_off000155a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155A0 18476 bytes
SHA-256: 105c169c0d998cfd7995e828c04b71f8baa277d298a0a614b4963a4811851512
font_03_sfnt_off0001717f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1717F 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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