Malicious PDF — malware analysis report

Static analysis result for SHA-256 866c5542c9f7a122…

MALICIOUS

PDF

104.3 KB Created: 2021-07-14 09:53:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7863aeed375472093ec0180d44c7e82e SHA-1: a09f82047884aa049582306eb4e021ec53bbed3c SHA-256: 866c5542c9f7a122c8fec9e45318363ebd382dab8a361ecb6d9c6912a64d7d29
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, despite some being marked as benign, suggests a phishing or redirection attempt. The PDF structure and embedded objects are consistent with malware delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9162

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/AnJPYMJXbyQ/square?utm_term=gta+v+fastest+muscle+cars
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee73d339b82603386d5d5f/1626239955911/tevorazajajaxawubirobaziz.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e76e88daeda25844eeb630/1625779848360/xegojuzil.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7a4ffd54eb070824e279/1626110544043/likulimupenabaxeze.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e7930969e16759cf71a57d/1625789193688/convert_streaming_video_to_mp4.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e877ec8f543d48c882f441/1625847788079/90ml_mp4_songs_download.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec8ef3e0c99b3eb2d374bf/1626115827217/analytic_meaning_in_telugu.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e84749ca800d6833deb86b/1625835337246/mikes_weather_page.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8a6222bd7a9201623ac51/1625859618779/illogical_meaning_in_telugu.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_off00013871.bin
a97a61dc9049f99fb006b3afcde41194ef345a8ad8866f20e4c1ba5a5d7f492f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13871 17208 bytes
font_01_sfnt_off00016598.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16598 16792 bytes
font_02_sfnt_off00017daf.bin
d82eeb3287a36f9d001e510b06c680fa16d0069f7ead8445ef019f9f511d6855		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17DAF 10388 bytes

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