Malicious PDF — malware analysis report

Static analysis result for SHA-256 281aa6ae3670afa9…

MALICIOUS

PDF

85.6 KB Created: 2021-03-14 12:01:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01932c421ba19df5cc77719c6c61a850 SHA-1: de4c62f92fe8d6a0b2d089f027bdc9de3ea9fdf7 SHA-256: 281aa6ae3670afa9aa322d0cc30fa0ef98f7df67691059ea40695b9e5ecf39a3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains numerous external links, with one prominent URL leading to a suspicious domain, suggesting a phishing or malware distribution attempt. The 'SE_INVOICE_LURE' heuristic indicates the document's content is designed to deceive users into taking action. ClamAV detection and ML classification confirm its malicious nature, likely involving exploitation for client execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 6

  • 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
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://soxebez.ru/wix?keyword=new+jersey+municipal+court+procedures+manual
    • https://cdn-cms.f-static.net/uploads/4403141/normal_601e890068cbe.pdf
    • https://static.s123-cdn-static.com/uploads/4392199/normal_5fde2afb3e11a.pdf
    • http://zovofuti.mygamesonline.org/5164324787.pdf
    • http://wemuwetafivaxe.sportsontheweb.net/93572749918.pdf
    • https://static.s123-cdn-static.com/uploads/4409609/normal_60030bdba92c7.pdf
    • http://lejunuzegakikuv.mypressonline.com/sony_hdr_as100v_external_microphone.pdf
    • http://modezewop.mygamesonline.org/zozatinasumalovawas.pdf
    • https://cdn-cms.f-static.net/uploads/4366028/normal_603fd8e905845.pdf
    • http://wumewil.sportsontheweb.net/is_marvel_zombies_canon.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jagux/the_green_mile_full_movie.pdf
    • https://5a995288-ce6f-4ae3-a3e6-14272d8003db.filesusr.com/ugd/7be1cd_577ff8084189474d89376fb5bed444b3.pdf?index=true
    • https://1bf92926-22d0-44a1-94fb-b51843c41cd5.filesusr.com/ugd/762c1a_b9fc4ae1fc2d47a097739ab6969b4e3c.pdf?index=true
    • https://s3.amazonaws.com/fupanabivote/91414577238.pdf
    • https://5d9de69b-f80b-44d6-9c2d-9027806fef0b.filesusr.com/ugd/e26ad2_3964b696e46f488a8d5898308e9c0325.pdf?index=true
    • https://044e8d80-c429-4a1f-820d-9b443c65b389.filesusr.com/ugd/53c654_182410465ffe4c66880b2aa39f4307a1.pdf?index=true
    • https://s3.amazonaws.com/kosipefojaw/animated_movies_2016_free.pdf
    • https://s3.amazonaws.com/tolivajupeku/jujuligupoguwipoluxuj.pdf
    • https://c3438639-6a75-4920-aa4f-d1e0b619354f.filesusr.com/ugd/3be3a7_3c2a195354b14d7d99a9a9b0f8b652ba.pdf?index=true
    • https://s3.amazonaws.com/nafoxuda/dutesovawosajovarimepof.pdf
    • https://s3.amazonaws.com/wixanarer/23689910086.pdf
    • https://s3.amazonaws.com/wexukufedepim/49585149357.pdf
    • https://d525ee04-2a40-494f-8ba9-fee52f7b18ee.filesusr.com/ugd/8b8e24_0b7ba93454a94b17a5fdeacbc694d5af.pdf?index=true
    • https://5e9816b5-e261-4a84-a5c7-594b6999e1c8.filesusr.com/ugd/eb2f7d_91a5ea10dded4b98a8dd857d74989c4f.pdf?index=true
    • https://s3.amazonaws.com/babuxufarizuxur/how_to_adjust_resistance_on_nordictrack_elliptical.pdf
    • https://s3.amazonaws.com/tigewibejageju/50242531475.pdf
    • https://0eaabcdb-938a-45a6-85a3-1a7d796bbcdd.filesusr.com/ugd/8d6d25_96e8f9950d3040ce86ce9b716c0517f2.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011147.bin
a390d943f536b165869b5c6476a12c64c7df2e680b38a8be7eedba1cf383945e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11147 5456 bytes
font_01_sfnt_off000123db.bin
afb48de06f5ea23aae8c20a74ab9f2c1ce42f26a80714e4c18cd638996ecd7bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123DB 10820 bytes

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