Malicious PDF — malware analysis report

Static analysis result for SHA-256 181e2d252e7cf459…

MALICIOUS

PDF

74.5 KB Created: 2021-02-19 22:52:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 075c35c7017206bac5d18faa6f983f47 SHA-1: a08fbcff392724a8bbe7ad93e6a82c22121fd4ad SHA-256: 181e2d252e7cf45913d3760033d316540e75e24ce53df4548d293b378d3d363e
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier and ClamAV detection further support its malicious nature. Although the document body is heavily obfuscated, the presence of the malicious URL suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/123?utm_term=what+is+meaning+of+lattice+enthalpy In PDF document text
    • https://cdn.sqhk.co/teposodigar/edjiPhf/roku_premiere_remote_with_headphone_jack.pdfIn PDF document text
    • http://tojenan.iblogger.org/76962768205.pdfIn PDF document text
    • http://xudikuruno.iblogger.org/wifakutekesemo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lunijikujapike.epizy.com/mezedavevisop.pdfIn PDF document text
    • http://zadedasex.epizy.com/69440696822.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/kinogivagawilivevidital.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/barber_shop_2_game_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/holding_company_accounts_format.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/social_entrepreneurship.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/90008219193.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/xolulaw.pdfIn PDF document text
    • http://xofafatererowu.rf.gd/79834416131.pdfIn PDF document text
    • http://kebanibaru.epizy.com/answer_key_neet_2019_official.pdfIn PDF document text
    • http://nugafafekovad.epizy.com/guwulujesifez.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/9791284901.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/30915923740.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/viwonu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FC 5448 bytes
SHA-256: 7bac0bc98901ce04e8b45e029db37e8223f393f91408366f84128338c31827ea
font_01_sfnt_off0000f780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF780 10772 bytes
SHA-256: 6baa17e80946b40b9c82d31e99638b3b0217cdb12153fa68eea2dac321fcc419

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