Malicious PDF — malware analysis report

Static analysis result for SHA-256 298d22ce2fc12984…

MALICIOUS

PDF

66.8 KB Created: 2021-02-26 11:01:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c1ba0afb258113ed463c95e6505be255 SHA-1: 25055dd91878d5582c0b477fef69a1b3e79073b5 SHA-256: 298d22ce2fc12984ce3d519b30b352276957d11f7889721612d3dc3d1433d70a
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV also flagged this PDF as malicious. While no scripts were extracted, the presence of external URLs points towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9706

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://jumiwimov.ru/award?keyword=schlage+keyless+lock+battery+size PDF link annotation
    • http://autolombardpro.ru/70060613289o7825.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392452/normal_602a2e0d5c3ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412173/normal_5fe66bdb654c4.pdfIn PDF document text
    • http://alcozerox.com/azimuth_and_bearing_problemsjbk3s.pdfIn PDF document text
    • http://newyearshop.site/how_to_connect_bose_wave_3_bluetoothk491j.pdfIn PDF document text
    • http://iminn.ru/mesesepomerimilalabizaxukpw7ks.pdfIn PDF document text
    • https://tupokigefadewun.weebly.com/uploads/1/3/4/7/134702618/7099063.pdfIn PDF document text
    • https://jimitorivav.weebly.com/uploads/1/3/4/8/134878901/solijipuf_jobore_kizerudapomit.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/tubupejevomo/popokoxixi.pdfIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/95397470841.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/bed_sheets_storage_ideas.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/wedolipab.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/shadow_blade_full_version.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/amadou_bamba.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/chinese_language_app.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/how_do_i_save_a_transparent_background_in_paint.pdfIn 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_off0000d360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD360 5520 bytes
SHA-256: 7ae988d043df616842d0426bec3e8d5330269964a2e4fac9a7dd6581eb0618e4
font_01_sfnt_off0000e631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE631 10216 bytes
SHA-256: 7e8d7ac9f7b2cc396305eada86cbb2abb6a0fb2425ee1d2d2c2e8acbfc6d5618