Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3324bc6f687a46f…

MALICIOUS

PDF

78.6 KB Created: 2021-04-04 12:49:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 011e0503d51741d4e0ac68098d1c77cb SHA-1: d1de13eaa438b99c23568f2deafd588efbd47698 SHA-256: b3324bc6f687a46ff39182d2feae3e4dba0e2449b6fa66a1bedba52e79897d4b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to potentially malicious domains, indicating a link farm or phishing lure. ClamAV detection and ML classification strongly suggest malicious intent, likely for distributing further malware or conducting phishing attacks. The embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/strik?utm_term=2000+jeep+grand+cherokee+laredo+lug+pattern
    • http://reweder.site/37678184925jum3n.pdf
    • https://zibakuponitek.weebly.com/uploads/1/3/5/3/135303957/munudanoposos.pdf
    • https://nagiwudulowep.weebly.com/uploads/1/3/0/7/130775657/duduwewobupa.pdf
    • https://nitaluba.weebly.com/uploads/1/3/4/3/134348735/428105.pdf
    • http://idealicait.site/sticky_sticky_song_lyricsom03h.pdf
    • https://vokubopupabilu.weebly.com/uploads/1/3/4/6/134691430/9da5b9.pdf
    • https://wetevuwerego.weebly.com/uploads/1/3/4/8/134896505/gaduviwafare-semazax.pdf
    • http://good-production18.site/sweet_clara_and_the_freedom_quilt_art_activitiesoimmb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://e4fb9bf1-a3d6-4767-9bf2-2a1021e5dc09.filesusr.com/ugd/53cfc7_0bbe01dc0d364728b4686404b0e96646.pdf?index=true
    • https://s3.amazonaws.com/luxelula/how_to_be_a_pimp_101.pdf
    • https://s3.amazonaws.com/joterige/atheismus_andere_formen.pdf
    • https://2e8e3215-33bf-4fe1-bc67-b38dac560527.filesusr.com/ugd/269bb8_3a134d682a75472d8e292aaf84eea604.pdf?index=true
    • https://s3.amazonaws.com/moduxanakuri/free_printable_multiplication_worksheets_for_2nd_grade.pdf
    • https://8f6f9f04-f977-4239-955d-f6aecf2dd879.filesusr.com/ugd/81cd61_2c8ae9d5840d43ac95dfc5d7f9598dfe.pdf?index=true
    • https://s3.amazonaws.com/gurupixabogivaz/rutizu.pdf
    • https://s3.amazonaws.com/kabisebax/las_mujeres_que_aman_demasiado_frases.pdf
    • https://s3.amazonaws.com/xupimaral/mifawodu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e827.bin
dfa5bc9de8fadb735357a515c82d6387844dd5ae91e623627e3425f5f5a55f87		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE827 5308 bytes
font_01_sfnt_off0000fa2c.bin
86cb99057ae2f7a1c231c8f7c59f4f5aa986cc3eb130a4471acbf992ec45743d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2C 10780 bytes
font_02_sfnt_off00011f14.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F14 4324 bytes

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