Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2eaa55fcf0dde9a…

MALICIOUS

PDF

79.3 KB Created: 2021-04-17 13:56:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8568b8457c6fb08c0d3e6fb555724dd0 SHA-1: db7ce8a19bd4778e4f020c89c6345e60c2f58601 SHA-256: a2eaa55fcf0dde9a373a6c91010a9c0fa870a51d9c8589547086c5fecdc52054
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, appears to contain keywords related to 'Nikon dx cameras 2019', suggesting a lure to entice users to click the malicious link.

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://kuzutuzo.ru/strik?utm_term=nikon+dx+cameras+2019
    • https://cdn-cms.f-static.net/uploads/4474989/normal_6054e76eb5c7a.pdf
    • http://dilomevoje.22web.org/18618648782.pdf
    • http://niginotan.22web.org/pufivaxu.pdf
    • http://vakekaninu.iblogger.org/anemia_ferropenica_minsa.pdf
    • https://static.s123-cdn-static.com/uploads/4470028/normal_5fe1a538140d2.pdf
    • https://tivepikilusu.weebly.com/uploads/1/3/4/7/134759048/8485000.pdf
    • https://cdn-cms.f-static.net/uploads/4483071/normal_600d6a6d47001.pdf
    • https://forabuluzasojar.weebly.com/uploads/1/3/5/3/135303956/bejiw-rajafefun.pdf
    • https://biwewonopegad.weebly.com/uploads/1/3/1/3/131380063/zakajexomewuvom.pdf
    • http://vosalax.22web.org/74029287322.pdf
    • https://gisonegeviwobi.weebly.com/uploads/1/3/1/3/131383673/jeditiz.pdf
    • https://static.s123-cdn-static.com/uploads/4475397/normal_5ff4683061592.pdf
    • https://static.s123-cdn-static.com/uploads/4377662/normal_5feb524135804.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kesugonapopuw.epizy.com/how_do_i_file_a_usps_insurance_claim.pdf
    • https://uploads.strikinglycdn.com/files/8fbb3f54-161f-4f74-b810-7bebbb3d944c/finoxabexuxuzis.pdf
    • https://uploads.strikinglycdn.com/files/26ba5a26-1da6-4291-aec2-995ea4ddadff/lakuron.pdf
    • https://uploads.strikinglycdn.com/files/a7b08744-6165-4a5c-8cff-33cdeebb9910/black_feminist_thought_collins_2000.pdf
    • http://koduxope.rf.gd/tabla_periodica_en_ingles_con_dibujos.pdf
    • https://uploads.strikinglycdn.com/files/bc8354e6-525a-4e8e-9eb2-287abe8f7418/19769916313.pdf
    • http://vugikalijuboxo.epizy.com/computer_file_kaise_banaye.pdf
    • http://bibarixe.epizy.com/antifungal_drugs_pharmacology.pdf
    • https://uploads.strikinglycdn.com/files/29f8faf1-1f3d-4d70-bb38-6d8297613c16/can_you_share_a_private_group_on_facebook.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4f5.bin
0422176100e3a7332731a81258712381ba80919bbca18e0751e842489fd2a8e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F5 5636 bytes
font_01_sfnt_off00010812.bin
5e6b1a90dd9a5a65a7d89d8145bfffae9be00e1e66bbf2049633b8ba175160bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10812 11464 bytes

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