Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b9e34789d8c645d…

MALICIOUS

PDF

76.3 KB Created: 2021-07-19 14:40:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e9cd5f073de81a85770f5c22f4267065 SHA-1: 0feebbd91a58eab55afa8841eb721f5f710e061c SHA-256: 5b9e34789d8c645dd2b804facff9d2a9843498eb82b9468c10c5263d4bfadb65
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains embedded URLs, suggesting it may be used in phishing campaigns to redirect users to malicious websites. The obfuscated document body and the presence of external URIs point towards an attempt to conceal its true purpose, likely to download or execute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/aauXj3bnHUA/square?utm_term=base+which+is+not+an+alkali
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f0482e4063550b15808145/1626359854398/painful_peripheral_neuropathy_causes.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edfc68ba7c7f743c2068b0/1626209384179/gajologigom.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f012c7c00d13116b44ff7b/1626346183180/68461531974.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f2af2b6d5e991e36d8abe7/1626517292165/a_with_an_apostrophe_over_it.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee8baafb3cc800db59b023/1626246058238/11_gauge_plate_thickness.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ed97158525735ba0d0fcde/1626183445585/metafizekonevofujafo.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e7b995efb14d11220f83fd/1625799061382/zujakewop.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f5596ed9389f5e80a5a573/1626691950538/xipiziserekijafinijuz.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f3b1ea04a1d970179fdbc7/1626583530239/satiwun.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8ebc10cbdad4d35037dca/1625877442089/74650943091.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f3906680d83038fa8545dc/1626574950506/12224716005.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f1e6a4c97a2d35ca7a957b/1626465956538/39612754387.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_off0000cac4.bin
42a86417b42aae81d0f92da15179f028af67fbe7fbc9cb7b3a5cdf2531fcaa9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCAC4 10456 bytes
font_01_sfnt_off0000e290.bin
69eb9615c468fc574f70bbb3908c2e79a9ff06e7abe76eb15b50f9cedecba75c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE290 16344 bytes
font_02_sfnt_off00010d04.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D04 16792 bytes

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