Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe29ccb64f758c5d…

MALICIOUS

PDF

79.8 KB Created: 2021-02-26 21:48:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f46d61605dfbaed23b36b9b6830c818e SHA-1: d577cfb49d6ae6ee887aac8ba55346fce91bdd96 SHA-256: fe29ccb64f758c5da6e860e4ac390bc59cb923b46ee66b3a99f05e17b4b3c4e0
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with a notable heuristic identifying it as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The document body, though partially obfuscated, contains text related to 'permit test', aligning with the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://zajinet.ru/123?utm_term=how+do+you+cheat+on+your+permit+test PDF link annotation
    • http://wopudenunebuwaz.22web.org/python_for_mac_yosemite.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477863/normal_5ff8bf6b0c3ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368230/normal_603710031721a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377095/normal_5fdd95c494a04.pdfIn PDF document text
    • http://pycnidwzxc.info/savaborizezobisawugelijasv540.pdfIn PDF document text
    • http://discout.online/autocad_commandq102r.pdfIn PDF document text
    • http://vkrowl.com/90760308809gh7xw.pdfIn PDF document text
    • http://shtangye.xyz/bovikiljbu.pdfIn PDF document text
    • http://kopuvimu.scienceontheweb.net/pubidonobutamifaki.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
    • http://wuwedilejom.myartsonline.com/32506664770.pdfIn PDF document text
    • http://lewozato.epizy.com/kuehne_nagel_international_annual_report.pdfIn PDF document text
    • http://mebusojuf.rf.gd/lulavi.pdfIn PDF document text
    • http://botalibinizor.rf.gd/41655506733.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/30718177418.pdfIn PDF document text
    • http://pabewuvuxaf.onlinewebshop.net/95126681267.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/ableton_live_lite_32_bit.pdfIn PDF document text
    • http://bugenerefajujus.atwebpages.com/lukirof.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/blood_pressure_cuff_manual_pump.pdfIn PDF document text
    • http://kiwusumusi.rf.gd/ponomitoligesivowubewa.pdfIn PDF document text
    • http://pevoxetawalob.rf.gd/rpg_maker_xp_keygen.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6B 5316 bytes
SHA-256: 6ae51a2e176506eee1f54b81511d0dd66cc4e6dc8a684530659e66b437496ffc
font_01_sfnt_off0000fe5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5B 10908 bytes
SHA-256: b84ba05a7d834611c1d1ce0a1dad1ea11f2f79ccd8674d18105cc97b99235cc5
font_02_sfnt_off00012376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12376 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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