Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee984fcdcbbbd393…

MALICIOUS

PDF

83.0 KB Created: 2021-07-18 22:11:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a8ae5659d696dd5428fa6c650c908f81 SHA-1: 0211a20a9ac356a8bd821d6089eb8f3f348b15e9 SHA-256: ee984fcdcbbbd393f781e8229ff6ee308a7720057d078db1a634dc99784dc311
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains embedded URLs that lead to seemingly benign Squarespace pages, but the overall structure and detection suggest a malicious intent to redirect users. No scripts were extracted, but the PDF structure itself is indicative of a lure for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8298

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://feedproxy.google.com/~r/sq/ugae/~3/v-xubMviL4Y/square?utm_term=the+best+method+of+sociological+research+to+use
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f11cd31d653208009b5584/1626414291760/under_what_clinical_conditions_does_a_patient_need_haemodialysis.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f2ed88b84a576e6cfb1a38/1626533256752/80058620294.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f297e42e59700d3e55f869/1626511332243/jadanowolusuzil.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f11db774384d54fdfd6d0e/1626414519705/fonexifabaxenisebezek.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e92546563c1506a8b64a2a/1625892166801/galebegorogezarekibobixo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6de.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DE 16792 bytes
font_01_sfnt_off0000fef0.bin
5ff7fbd3ebae91b9b235c98126af056f0d4f369b461b5eb163722212d0b5b743		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF0 15552 bytes
font_02_sfnt_off0001267c.bin
38632132aff96f2c626d71473928244107a84fea1e4495c70d23645f2ac5daea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1267C 11020 bytes

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