Malicious PDF — malware analysis report

Static analysis result for SHA-256 d852a5c6c59ee73e…

MALICIOUS

PDF

109.9 KB Created: 2021-07-15 10:43:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 755381c25579b8fbd68cf2567a77a8a6 SHA-1: d86d27bbc419d8a19a452454208a5234f5c5c874 SHA-256: d852a5c6c59ee73e57ec0cb51919d3f3704dd9966b71f6b0e865a6f5d75f8353
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ClamAV heuristic identified this PDF as a phishing trojan. While most extracted URLs are confirmed benign, the presence of an external URI points to a potential redirection or lure. The document body is heavily obfuscated and unreadable, preventing a more detailed analysis of its specific content or intent. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3066

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/ZFaGRQ6RLlg/square?utm_term=gn+green+technical+drawing+pdf PDF link annotation
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8e118f107ff2467e5a4d0/1625874712827/28304480415.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee0760e7c05a53525b3b36/1626212192781/astigmatism_in_5_year_old.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8ce0573083775092e5976/1625869829487/the_christmas_chronicles_2_free_online.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec98bbdef1ca41d5fb2325/1626118331734/hp_touchsmart_9100_manual.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000136ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136EA 10736 bytes
SHA-256: f483d16f7514295ef4debb3db6a881583389e66b4185c3a05079d7a6ff0d8275
font_01_sfnt_off00014f5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F5B 17500 bytes
SHA-256: 6e0bf28c7b5416f3ffbc95300f0ee5465350af97d516b3ae17701e868268dcb1
font_02_sfnt_off00017dc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17DC8 16172 bytes
SHA-256: ec25a194e58310d4b4f8f98b65ed61dd143b4b8be5e3a8acd4a17d0e900953be
font_03_sfnt_off00019362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19362 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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