Malicious PDF — malware analysis report

Static analysis result for SHA-256 38c7cc18d005a1d9…

MALICIOUS

PDF

81.6 KB Created: 2021-03-21 11:34:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c40072327ba1a518f09309f586184411 SHA-1: 5021c7f9eb068ddc5ce1ad9bfc3af2935f0e1f12 SHA-256: 38c7cc18d005a1d98a5eb285e7a630124b47945d78047b98c1d3619afdc59c36
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting or link farms, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be a lure related to 'Air Canada timetable 2020 pdf', aiming to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9831

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://baarspo.ru/award?keyword=air+canada+timetable+2020+pdf
    • https://vadutebo.weebly.com/uploads/1/3/4/8/134889136/rebapanimilivadawi.pdf
    • http://uspehdnyaaxyz.xyz/7768974395229o7b.pdf
    • https://cdn.sqhk.co/sofizagumup/kjgjjja/sijogepaxurikopotozubaj.pdf
    • http://startbastar.online/62345015099le9tz.pdf
    • https://gokepitamewema.weebly.com/uploads/1/3/5/3/135325242/1bdfbe.pdf
    • https://cdn.sqhk.co/tusenepobam/jagjb6T/ninja_foodi_air_fryer_recipes.pdf
    • http://nextauto02.ru/divujerivudezexetudryj1i.pdf
    • https://cdn.sqhk.co/rekubapapup/bHginz0/directv_now_packages_channels.pdf
    • http://soldatskaya6.ru/98214836327ttsil.pdf
    • https://static.s123-cdn-static.com/uploads/4455198/normal_5feb72e46a711.pdf
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/naxexijegukufije.pdf
    • http://memaberenux.scienceontheweb.net/45267509452.pdf
    • https://wodaxudufusan.weebly.com/uploads/1/3/0/8/130814186/9204518.pdf
    • https://cdn-cms.f-static.net/uploads/4481058/normal_60418dee18f4b.pdf
    • http://beritox.medianewsonline.com/math_books_for_preschoolers.pdf
    • http://flymoney.net/how_long_does_it_take_to_do_an_echo_testqkb1g.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://fidalanono.myartsonline.com/zejenezenemizoronoku.pdf
    • https://uploads.strikinglycdn.com/files/ead0d9bc-690e-4151-bf78-f0b77eec1273/how_to_do_algebra_1_with_fraction.pdf
    • https://uploads.strikinglycdn.com/files/f281d7b9-d804-4c01-ad2f-b5dd3ffd6989/18803938165.pdf
    • https://uploads.strikinglycdn.com/files/f2187c62-f0ab-4da2-9d26-bc8787a1c989/12922739353.pdf
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec31.bin
ffeb89eaad713c9717385028f79c9757067aafb2c2382ea8cbab0e6efe35a425		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC31 6744 bytes
font_01_sfnt_off0000fd19.bin
bb4d57987bcb9818b45f5c1525a909398a90da635d63bf64392c946836c1745f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD19 5204 bytes
font_02_sfnt_off00010e9c.bin
8a3ff8f3240f58100236b481d3a65bf77d3cedd0a3ee5dfa5e01d8d96fa735ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9C 12096 bytes
font_03_sfnt_off000135ce.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x135CE 4324 bytes

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