Malicious PDF — malware analysis report

Static analysis result for SHA-256 cece4febc0cc6e97…

MALICIOUS

PDF

94.5 KB Created: 2021-07-23 01:16:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a5597727bae25659d2d1148b3c2a612f SHA-1: 54d3d9018762b9d2462e5540eea0cb45dabb0eb9 SHA-256: cece4febc0cc6e97fed9f0a08027ec098ce8faebfdcf90e95c929b764bf8ea4f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URL pointing to a suspicious domain, identified by heuristics as a potential phishing or malware distribution vector. ClamAV also detected the file as malware. While no scripts were explicitly extracted, the presence of an external URI and the ML classifier's high confidence suggest malicious intent, likely related to spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://medvor.ru/square?utm_term=cartoon+network+style+guide
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f6c29d1f75e014b6e0daec/1626784413161/are_you_up_in_spanish.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f2b51c04a1d97017946db9/1626518812694/novels_to_read_in_english.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f9e0b44042612857f3849b/1626988724416/isaiah_chapter_53_commentary.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60eca508c426b81e83030f14/1626121481033/62261443764.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f6dc15e070b16d32e4b1ae/1626790933884/orthopedic_surgery_expert_witness.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec9fdc69d4b63361498da0/1626120156418/59422934494.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e800747d3b385c94b70551/1625817204400/leborifagotajo.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f6238bd7756961bad08970/1626743692111/tilaxixonedafola.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee51ba27fa864c7d130adf/1626231226678/american_suffrage_association.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f085a011cad82123c884f8/1626375585065/packed_red_blood_cell.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f963e3ec70443d923fafa9/1626956771772/wodenoritof.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edb326c48108232e470a17/1626190630819/cobuild_english_dictionary_online.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f319efc4d0d61e6735334d/1626544623542/41899577991.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f3db1dd68f3225905ee576/1626594077117/wotaxodakus.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f06835dd8e8d2fca673d82/1626368053334/analytical_chemistry_lecture_notes.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f9e0dd7bc47074a7c0bf08/1626988767394/12561551292.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e908bd37cb9044755f04ac/1625884861356/autocad_electrical_cracked_version.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e9087f025aa46e30d1bcbb/1625884799486/37402269117.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee0812e03b615e0989ed69/1626212370524/salilupojo.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f63f4b77a6136bf6f795fd/1626750796034/contra_3_the_alien_wars_rom.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
stream_006_off00010e97.bin
9229bde5e3614c940ebb387a6affb910e6b09cdb82f6b0ab59768fbd23138caf		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10E97 16244 bytes
font_00_sfnt_off0000f58b.bin
baa4c74b8865b7de82ae0fe0b08a500ba40ebcf34b532796378e05330bc7f30b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF58B 10848 bytes
font_02_sfnt_off00012483.bin
ed88b19f50f1d79143f5f5fc81c1e1d0cca9cf1736a0ae4258724a2b8031ae22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12483 17616 bytes
font_03_sfnt_off00015315.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15315 16792 bytes

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