Malicious PDF — malware analysis report

Static analysis result for SHA-256 229a55f3ce6536f4…

MALICIOUS

PDF

73.7 KB Created: 2021-07-18 19:12:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 14a0bbdf78c73410aa17c96a72bab87b SHA-1: 061bec85a2288ab84e3c851ee648105c3d8066d7 SHA-256: 229a55f3ce6536f430272a5724f679fed2ca4e8c87078eac54dc4b24bbe82472
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains embedded URLs that are presented as legitimate links, likely to deceive the user into clicking them. No scripts were extracted, but the presence of embedded URLs and the nature of the heuristics suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9163

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/W5vEtEh6t-A/square?utm_term=boulder+county+assessor+property+search
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f439263a33e4096de47cc7/1626618150724/rewatewuvemola.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e933fe18245d33f1825613/1625895934588/97812706382.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee0853e03b615e0989f137/1626212435969/yvaa_chiller_manual.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec8c2f478ebe26bfc5fe8d/1626115119538/lonely_planet_norway_download.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e82a766e46386ca3c3da6e/1625827958382/grey_literature_meaning.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee0267cb43530604abebdd/1626210919872/accord_coupe_6_speed_manual.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8ce64c158db2a32da673c/1625869924617/i_pulled_a_neck_muscle.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_off0000c0a7.bin
e9ff08fdc5ad179a4810b8542dc2975d07adf8b46c9e24a0a0461615d286d2ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC0A7 10784 bytes
font_01_sfnt_off0000d983.bin
5c63dcd5f2b64b2007d192a72c1d91f170f00abb3f30cf226c10fd4c4ddb70ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD983 15924 bytes
font_02_sfnt_off00010285.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10285 16792 bytes

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