Malicious PDF — malware analysis report

Static analysis result for SHA-256 7318a87e997fb30d…

MALICIOUS

PDF

71.3 KB Created: 2021-03-16 09:20:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68449848dd7ef9e2b65ca670f242971b SHA-1: 188463547ef9a150be4b887b51c5ab777f24d5e7 SHA-256: 7318a87e997fb30d8833af5dca38e76d1b1a8dac6c8fd5df9b6f57de45405627
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 Weebly domains, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://dafemum.ru/award?keyword=catechism+online+pdf
    • https://lewesasegejawu.weebly.com/uploads/1/3/5/3/135315787/vexabofevizere.pdf
    • https://buniburus.weebly.com/uploads/1/3/1/6/131637527/2297817.pdf
    • https://nevofegef.weebly.com/uploads/1/3/4/8/134851200/sogax.pdf
    • https://donarebam.weebly.com/uploads/1/3/1/4/131453010/7347043.pdf
    • https://rigopodi.weebly.com/uploads/1/3/4/3/134307943/badamotaz_nomanoralaxil_rebowinax_fifixawelun.pdf
    • https://liketoxisok.weebly.com/uploads/1/3/0/7/130739237/f9de2.pdf
    • https://tovunebutulewe.weebly.com/uploads/1/3/1/8/131871744/ruduwemubamudu-vukovexeju-josujin.pdf
    • https://sarowamirubene.weebly.com/uploads/1/3/4/7/134736793/kimominixomogozabo.pdf
    • https://zamamuxito.weebly.com/uploads/1/3/4/2/134234866/rexatukumirame_bewivosivewup_gazopupo.pdf
    • https://bojufare.weebly.com/uploads/1/3/1/0/131070992/wosijamenodu.pdf
    • https://zupavuzinopaz.weebly.com/uploads/1/3/4/2/134265708/lutowiwaminuv.pdf
    • https://piximemob.weebly.com/uploads/1/3/4/3/134371032/883341eddf3.pdf
    • https://nimadelafux.weebly.com/uploads/1/3/2/6/132695392/digunefugalob.pdf
    • https://wibixebaroz.weebly.com/uploads/1/3/1/8/131856543/rekokegiluk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://5a060084-92f5-4e09-b02e-bbac8bb45871.filesusr.com/ugd/05c943_e151880fbaf748aeb3aed1a898d9f0b3.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e036eee3-e691-4596-8bc2-357d39acf224/molezi.pdf
    • https://uploads.strikinglycdn.com/files/f210054c-53b2-4ca7-9b33-f3ec9d598279/best_money_market_interest_rates_in_south_africa.pdf
    • https://8eccd3b7-fb20-4588-a5b5-4d8c58591879.filesusr.com/ugd/0e6328_348d1333d0aa42febfec961b84c7ec99.pdf?index=true
    • https://uploads.strikinglycdn.com/files/fd4ef7c5-682e-4ffb-b09b-e3995a1290fe/14126166589.pdf
    • https://db6d201d-bdff-4648-9982-d9cfaac7639e.filesusr.com/ugd/98857b_cbd8809a93fc4610ba818a4f23dd3fbc.pdf?index=true
    • https://da5bec28-7969-4117-8ffb-5069fce5e80c.filesusr.com/ugd/31593d_88c6781502964a9d91b6f1f05a8a9063.pdf?index=true
    • https://76f5a3e5-08d8-4581-9975-6c1b933a1845.filesusr.com/ugd/dbbd16_e87db1b30278492f97abf26dcbe51124.pdf?index=true
    • https://uploads.strikinglycdn.com/files/87214e8a-d25a-48f8-bf58-7ffe4e1bd6a7/what_does_ka_mean_on_a_cobra_radar_detector.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_off0000d995.bin
02ad05b573996ca7215230c51a95a690a95bcbcef76b4386731e46eb68134434		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD995 5204 bytes
font_01_sfnt_off0000eb23.bin
6d1ced21bde96d44ec90ee1fb6a29aa14693e913acd444fa68c4fd05d64bf405		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB23 10852 bytes

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