Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1894f79a2fae81b…

MALICIOUS

PDF

101.2 KB Created: 2021-07-19 02:32:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dcd9a5c7e098fef7ae177b00424ae978 SHA-1: 2945858b06de9d6d19781455bc1127420de0bd18 SHA-256: c1894f79a2fae81b5bd5967070df27ee2dfcce6902645b7521145ff2c3790a0b
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 phishing attempt. The presence of embedded URLs suggests the PDF is intended to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing attack, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6232

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/WVKuihPcy9U/square?utm_term=least+common+denominator+of+6+and+10
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e7e915dbc52028c8401d7e/1625811222094/the_age_of_adaline_2.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f4b34427519501fc214225/1626649412554/libabesabozajiriw.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f362b4731d8c7c6ffdf64b/1626563252806/66766005515.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f41dbe1434f635472bb544/1626611134842/raroremadisibetezunux.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f49aa625edf123066865c6/1626643111078/jokowomozapamo.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee82672d09e34b72a3bb65/1626243688113/pun_of_the_day_2020.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60eda1e803cb9e0b59795b61/1626186216540/absent_minded_synonym.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
font_00_sfnt_off000110c7.bin
ab0b7985d738bd3514ebc8a92d4252d7d6478a762dff031fcc7fae43d1655301		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110C7 18320 bytes
font_01_sfnt_off000141cb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x141CB 16792 bytes
font_02_sfnt_off000159e2.bin
15ad3bd30fc30cf1ecd8ab5a78faef1d0889f474b50ce3ea07019b5d535ff769		 pdf-font-stream PDF embedded font (sfnt) at offset 0x159E2 10892 bytes
font_03_sfnt_off00017317.bin
325c5f5cda05429ae92d15c23118ca1b8712e485108c584e1e30b0ff615913b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17317 16084 bytes

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