Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff836f0c453dfbff…

MALICIOUS

PDF

73.8 KB Created: 2020-12-01 09:13:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 30f647eba9765bd722d38ff3a7a0c056 SHA-1: 68c462c5b766f4e33c10d652127f36cb831bd9bb SHA-256: ff836f0c453dfbff8e8ff1edd116abe0d3d55c5602d7a1277ddd6383002229cd
162 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains text related to 'agreement template australia', aligning with the SE_INVOICE_LURE heuristic, suggesting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://traffine.ru/aws?utm_term=agreement+template+australia In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf48b718e72e5fdbcda88d/1606371512054/joduwotepatimekixizimiw.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/toninelugituwobelevot.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc13debbd14ff0dd29efe80/t/5fc3b29e5147b14804a3e548/1606660768114/words_starting_with_ny.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/263e8f1a-053f-4a5a-9912-21d3345abf77/biwuv.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/zefurajimijipegule.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0b544c89e1c4b8fbd6471/t/5fc100d3bc819f1cf4fb8da0/1606484180219/futurama_worlds_of_tomorrow_1.3_0_mod_apk_2019.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc112c117e7202640eb3140/t/5fc1b6ab08845d0924ca6a10/1606530739359/ford_driving_your_dreams_scholarship_2020.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc12052bd14ff0dd29e0ecd/t/5fc36a9c61e25426e1a3b240/1606642333090/surudufijoleduj.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc18b3cc89e1c4b8fc2ff4a/t/5fc5b1d318e72e5fdb9c5ec1/1606791635703/birobaralu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce0038d1-b818-4e93-aec9-f4730d705e0b/16023140445.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf8eeb7ee8e70759e3b50/1606220016271/hot_shower_lyrics_youtube.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_off0000e576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE576 5128 bytes
SHA-256: c7778998f9ad68887b3c5268d50768910e77b65fc832cc3ed1194d4de220a320
font_01_sfnt_off0000f6cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CF 10576 bytes
SHA-256: ec7a20bee7035bfb3c397bedc6416bc178ac7e158007749db2d055f384f40b27

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