Malicious PDF — malware analysis report

Static analysis result for SHA-256 699d909c6dfe7b95…

MALICIOUS

PDF

84.2 KB Created: 2021-07-17 05:13:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aee9d55eb066748aa50df25d0e6a7671 SHA-1: bc327e65eb81918230ed10ce89c4b5179906da38 SHA-256: 699d909c6dfe7b95daf34950f79dd5d22a2359e8697b15a937370ab6b18cbfbb
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan. The presence of embedded URLs, although many are marked as benign, suggests an attempt to redirect the user to malicious content. The ML classifier also indicated a high probability of maliciousness. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5817

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/sq/ugae/~3/UQ8tT55rDuk/square?utm_term=eso+glass+style+motif
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f02d81e4fb0f110d7dbf7d/1626353025457/34854640819.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e81795ba333063f17af04b/1625823125965/an_introductory_english_grammar_stageberg.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec7ec54c0b954f9ea3b157/1626111685451/us_timing_now.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee1838c27d1e40a5477a03/1626216504659/the_sustainable_vegetable_garden.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_off0000e99f.bin
29db7530c918c45cbe4b9d5322d6c0e100a2eb638e6d5b60e5c733faf60a9770		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE99F 16744 bytes
font_01_sfnt_off00011548.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11548 16792 bytes
font_02_sfnt_off00012d5f.bin
673e5cf5d2b7cab544ac65db68a64699389b4af1693a02b660cbcc5f6e368d49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D5F 10452 bytes

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