Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0a3134e88b05d59…

MALICIOUS

PDF

67.6 KB Created: 2021-01-14 23:17:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: caffbe0635f80d4abdd745937ffb2b5c SHA-1: ea926a8646fad06ea0bdc899bfdbda417194b867 SHA-256: d0a3134e88b05d59a7010fdf74bf94253103e9f7a45317f5c551205d03f6ca63
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9614

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffking.ru/aws?utm_term=android+vs+iphone+usage+statistics PDF link annotation
    • https://site-1166675.mozfiles.com/files/1166675/mazob.pdfIn PDF document text
    • https://site-1176609.mozfiles.com/files/1176609/yang_yang_songs_video.pdfIn PDF document text
    • https://site-1172012.mozfiles.com/files/1172012/born_baby_images_hd.pdfIn PDF document text
    • https://site-1176115.mozfiles.com/files/1176115/ftdi_driver_mac_os_mojave.pdfIn PDF document text
    • https://site-1178385.mozfiles.com/files/1178385/alien_shooter_cheats_iphone_2020.pdfIn PDF document text
    • https://mumanewuneju.weebly.com/uploads/1/3/2/7/132712109/4730870.pdfIn PDF document text
    • https://site-1244975.mozfiles.com/files/1244975/team_meeting_agenda_template.pdfIn PDF document text
    • https://kuzogirig.weebly.com/uploads/1/3/4/7/134748708/f0505e82.pdfIn PDF document text
    • https://site-1171987.mozfiles.com/files/1171987/amd_radeon_hd_7870_drivers.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/xelimewat/broadview_middle_school_staff.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/adobe_spark_poster_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/analytical_formal_report.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/28880692688.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_off0000d3b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B8 5352 bytes
SHA-256: 59387421fd5b06ea701731bdd946d5ece164764752e959eb889fbb2625855d02
font_01_sfnt_off0000e5f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F6 10872 bytes
SHA-256: c487be2c661fa462adf7ccf495abf1de5862c8474aebd1681b4038c0776977c7

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