Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fff30521a7a8483…

MALICIOUS

PDF

76.4 KB Created: 2021-07-20 02:25:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 19849950840414acb652cd6eddcec5f7 SHA-1: 63872febe8a326d7e5d1480437a0af237b914c36 SHA-256: 2fff30521a7a8483d754462703b888cda3a9eb4a386ff393a4d5e3eb5ad85fb3
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that, while currently marked as benign, is presented within a context suggesting landlord harassment during eviction, a common lure for phishing or malware delivery. No scripts were extracted, but the presence of embedded URLs and the nature of the heuristics suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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=landlord+harassment+during+eviction
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f3c96c5f13a15bd8239dea/1626589548403/88180959740.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edb6435d4dee687f4b23dc/1626191427255/the_vein_that_carries_oxygenated_blood.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f125286e32095df983969d/1626416424745/tezojatax.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec8e060e7a3c5fba3e4196/1626115590438/jogogim.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f00bf65740a719f4aca32b/1626344438932/dishonored_2_steel_monitor_code.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee93538e3fff2bd3c4cdd5/1626248019183/63895342316.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60edf378d6548a387fd54865/1626207097029/50477829373.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f5fef5af7fdd46a5a7bf78/1626734325829/hobbs_and_shaw_2.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec8316ff9c8b53cea25a49/1626112790891/watch_seed_of_chucky_free_online.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_off0000c986.bin
b72554f1ea1a56d5e990238a62c19c20ea3cff6615b665f5666dee2e22cf7fe2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC986 10940 bytes
font_01_sfnt_off0000e278.bin
ddd97c25fb49a715719a931b34f99e91a88ea1e36707dd1c45c1b68cd92a3755		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE278 16416 bytes
font_02_sfnt_off00010d0c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D0C 16792 bytes

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