Malicious PDF — malware analysis report

Static analysis result for SHA-256 c70a637b27e7a0e7…

MALICIOUS

PDF

79.1 KB Created: 2021-07-13 03:45:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 82122b3e5b84abf4b757ffc1f14de5d5 SHA-1: b30777d8a3544ae9ac067609a10ba156661f2a11 SHA-256: c70a637b27e7a0e739fccb387b9d843f9d814efab64d90c8601a7045643280cc
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', strongly suggesting a phishing or trojanized PDF. While no specific scripts or executable content were directly extracted, the presence of embedded objects and the ClamAV signature point towards an exploit or malicious content delivery mechanism within the PDF. The embedded URLs, though benign, are common in phishing lures.

Machine Learning

  • Nyx PDF Classifier clean score 0.0894

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
  • 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/razvivatel/yapz/~3/UZrB20b2Dcg/square?utm_term=curry+leaves+restaurant
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e7c168d0799e4214bf44d0/1625801064584/rat_dissection_lab_report_answer_key.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60eca17d0e7a3c5fba405b2f/1626120573967/lajiwezegidujazafed.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c02e.bin
4466b7c0b9449e14496f33e40837f568ace54fa5e433ec77bf30c4a40c6ce59c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC02E 10200 bytes
font_01_sfnt_off0000d742.bin
39f87ac8b51fc60fe035a99183b6832cec67353c19671cf4f2532c1df27f1c53		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD742 16376 bytes
font_02_sfnt_off0000ed75.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED75 16792 bytes
font_03_sfnt_off00010587.bin
8e37a558ba4e8a5a92a2feec05798e15816ac03c9c9e41bc88919edc2e4dbf9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10587 16532 bytes

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