Malicious PDF — malware analysis report

Static analysis result for SHA-256 c36f8e92659b4c8f…

MALICIOUS

PDF

464.3 KB Created: 2021-03-15 21:43:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af57eef152fa8f15ea3f22f141b7ce87 SHA-1: 353067860788d3fc99e73b8a7a4753c90e4d7aeb SHA-256: c36f8e92659b4c8f5e791bbc78b1286735819a8ea83ee169c112b9992f7f0d6b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF as malicious. The document body, though heavily obfuscated, suggests a lure related to a popular novel, which is a common tactic for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8745

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://xezojetit.ru/aws?utm_term=that+time+i+got+reincarnated+as+a+slime+light+novel+volume+17
    • http://fovikoxesaweziz.medianewsonline.com/32227498373.pdf
    • http://rowexusaje.mypressonline.com/29740295203.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/43db8c7f-864d-4dc6-8ad7-0d42256c7088/masimo_rad_87_battery.pdf
    • https://s3.amazonaws.com/gajakelegeza/arduino_cnc_controller_software.pdf
    • https://uploads.strikinglycdn.com/files/19f1d5d5-067c-4561-9fb2-808a9edb257c/what_is_the_fp_on_a_license_plate.pdf
    • https://s3.amazonaws.com/vinivuxo/acrobat_reader_free_for_windows_8.pdf
    • https://uploads.strikinglycdn.com/files/18e93554-cc95-47b1-bbd8-672f5390ee9c/modep.pdf
    • https://s3.amazonaws.com/lekezaru/26211186263.pdf
    • https://1b3fde16-7575-45ba-b40e-8916c64185ca.filesusr.com/ugd/8874e8_93b89a430b04429d939e779c573129fd.pdf?index=true
    • https://uploads.strikinglycdn.com/files/6f9e5ce6-5929-4391-ad5e-dd164fd30dde/best_dungeons_and_dragons_5e_books.pdf
    • https://uploads.strikinglycdn.com/files/4f3c02b4-e4fa-4bb6-9530-351bdb05cf02/nawumodizusugezari.pdf
    • https://uploads.strikinglycdn.com/files/1d0c8549-2b64-43a4-95bc-68651f087030/black_and_decker_toaster_oven_cleaning_instructions.pdf
    • https://77a48bbd-706a-45f8-a225-ac1cc02029d7.filesusr.com/ugd/3be48b_b1b83bb3d3da4d55a0a39b970ca443c8.pdf?index=true
    • https://s3.amazonaws.com/jiwotarotavuz/guns_of_glory_kvk_guide.pdf
    • https://s3.amazonaws.com/kawotexulozax/84236538565.pdf
    • https://s3.amazonaws.com/fibesezati/piwazape.pdf
    • https://uploads.strikinglycdn.com/files/97e74342-a9cb-45e6-8582-5105da27e5ae/family_law_attack_outline_reddit.pdf
    • https://104e0e48-a4c2-4a03-8647-06ef64d4e6ac.filesusr.com/ugd/e2c6c1_c336bd9940b94daeaa30ec0cdaec70dd.pdf?index=true
    • https://s3.amazonaws.com/tudawufed/notakefogerukugozij.pdf
    • https://11f44e1d-c86f-4be6-baa1-90970e7c24f5.filesusr.com/ugd/a298ce_781f7553979f4341be544a177d494bed.pdf?index=true
    • 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://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00066a80.bin
b354e298ee32fcf4adcc2336e713e11bed8792021520d6ed8a718a7a77bfb819		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66A80 27964 bytes
font_01_sfnt_off0006c2a2.bin
d8c1d69acae150a04a4cad337567773715abf9eaffc40e123ee8c0a7f1ab8307		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C2A2 5496 bytes
font_02_sfnt_off0006d534.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D534 1800 bytes
font_03_sfnt_off0006ddc2.bin
02e3089abf99ab513d41d713c49e934703cb70ca93a4d27313d45803621f1a0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DDC2 28944 bytes
font_04_sfnt_off00071a39.bin
f267a97a42ed964490c0c36cf8d24d30f5cfc386ee24850e75bb3a4991f11828		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71A39 16376 bytes

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