Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3c5a64816a69be6…

MALICIOUS

PDF

92.7 KB Created: 2021-07-22 00:32:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a486ea1c971a372d66badc2cc95a799e SHA-1: 9e1ab23d9c852a190232f886787b7bb0e27426f4 SHA-256: f3c5a64816a69be6272bbc6b68789ea743afb5cace04f2c1c38757527263af6b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The presence of embedded URLs, although many are marked as benign, suggests an attempt to lure the user to external resources. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/~3/9xivtwLAy4k/square?utm_term=first+puc+computer+science+notes
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f88e12cab05a19223e19cf/1626902034685/rogazu.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f8066ca1bc6e1f97d7f850/1626867308758/how_to_hit_high_drives.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f597831dfa362ba7a162ed/1626707843672/public_switched_telephone_network_ppt.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee6c7d2d09e34b72a2d478/1626238077440/wogobukobu.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f7062ee10de22e37f8e33a/1626801710576/vumirine.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f3ec8450974615f928292c/1626598532640/micmacs_oriental_grocer.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f838c7c5d82f4e5e8fd87a/1626880199678/71933301192.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f1a4f96dd6aa56c127e000/1626449145585/genanapaxogowijopur.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ede74a7979814f85a95179/1626203978160/litifodemalipadewoja.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f74919aefed42e68476d81/1626818842472/lucifer_and_lilith.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f219a2890fa5305bda4e09/1626479010451/the_security_database_trust_relationship.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f3a65c9c7c9f0ea99e31d5/1626580572968/45464711327.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f06d4a879cfb2b826e7a2f/1626369355179/cms_website_quotation_sample.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec8cf4478ebe26bfc61316/1626115316786/project_on_electrostatics_for_class_12.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f22ba1ea581e22be258a1a/1626483617539/69734801324.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f24152d68f3225904e21f9/1626489170892/declined_meaning_in_bengali.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f249ee22602c08cae5ad9a/1626491374487/37098327783.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f4404fa9adb72803afd0c5/1626619983934/vorepowugofirerumefaxo.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60edb63b8525735ba0d4152b/1626191420137/behind_the_eight_ball_idiom.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_off0001086f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1086F 16792 bytes
font_01_sfnt_off00012086.bin
f7d7c8837f239f4725825a3a13137da1d1d3c9b61f90b0168e6e5e06086fe139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12086 10404 bytes
font_02_sfnt_off0001380c.bin
94ec3ae60a81290a1df339ac5a1d9bf068315ffaca37892e91289f4d9ede5c9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1380C 17200 bytes

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