Malicious PDF — malware analysis report

Static analysis result for SHA-256 516239de7b0ef0ba…

MALICIOUS

PDF

68.4 KB Created: 2021-03-17 05:36:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b06594eca599ce3a6269dbe6193ca84 SHA-1: 7928fe3d9b96a3ab56876092477aeb97a16c72a9 SHA-256: 516239de7b0ef0ba8df187d987f323f52bb17457168f502c5307703b5d5102b8
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are to PDF files hosted on various platforms, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the presence of numerous external URLs points to an attempt to redirect users to malicious content.

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://botokaw.ru/award?keyword=el+poder+curativo+de+la+c%25C3%25A1bala+pdf
    • https://pugufewosanagut.weebly.com/uploads/1/3/4/3/134331363/0dac8a88daf05.pdf
    • https://xasigusuvenazuj.weebly.com/uploads/1/3/0/7/130739755/dunofixovijajuba.pdf
    • https://rigukolanerimi.weebly.com/uploads/1/3/4/5/134519373/zuvofogikavibek-waxosij-keniwaxapodan-muvaz.pdf
    • http://wozilimesiz.mypressonline.com/lubamowegebuw.pdf
    • https://cdn-cms.f-static.net/uploads/4472506/normal_601948562656a.pdf
    • https://rifijilaguselud.weebly.com/uploads/1/3/4/8/134846829/6370486.pdf
    • https://static.s123-cdn-static.com/uploads/4462727/normal_5fc851771b215.pdf
    • https://kigolakelo.weebly.com/uploads/1/3/1/3/131380934/xufigumimoto_tojajanuverovi_vegodesu.pdf
    • https://cdn-cms.f-static.net/uploads/4495854/normal_605161860fa53.pdf
    • https://nubeboganiroj.weebly.com/uploads/1/3/1/3/131384383/248785.pdf
    • http://fezatubiwe.getenjoyment.net/jegatu.pdf
    • https://tujurexi.weebly.com/uploads/1/3/4/7/134743655/bututuvitu_jofumibito_wizijedovelajob.pdf
    • https://cdn-cms.f-static.net/uploads/4411682/normal_6018ade0bd7d6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://528f6e5c-6927-42ef-b7a5-a8f9c349750c.filesusr.com/ugd/07b979_944685ab2b2e451da204a7fd797e106d.pdf?index=true
    • https://441dbedc-201a-49d7-bb2a-292980023e2b.filesusr.com/ugd/473728_984ebac7f142434da0d957fa277e3f4e.pdf?index=true
    • https://62abf401-5fc9-4991-ac00-cb6a0c8cf8ec.filesusr.com/ugd/e4ff69_bf549d2dc8d045539dee718ac9c5c910.pdf?index=true
    • https://3a7b682b-4b85-4b21-836a-a34929c8735b.filesusr.com/ugd/0cd3a8_b77f8577d3824e8695e2a02a2e4fb17a.pdf?index=true
    • https://a79fbd7c-12a6-44fe-9d3c-43dc2b0795a8.filesusr.com/ugd/f95141_09315550120b4825b310dd35c0326bb1.pdf?index=true
    • https://144c9d4d-401b-437b-b89f-6a5816d7da47.filesusr.com/ugd/cd33f5_f177191843b444f59f3c89d34404fce5.pdf?index=true
    • https://89f68ddc-9f98-4e60-8afa-3e0ca6603e9e.filesusr.com/ugd/4725f1_274ff3657d0345c39cdc498c06a4ec37.pdf?index=true
    • https://c2c662fa-00ac-4c69-bf5d-04da7d6c99e2.filesusr.com/ugd/9b33c5_1268cfa66fbe4d46a21e37986cd6213d.pdf?index=true
    • https://737c154f-ca75-4484-807d-9d5c19d76377.filesusr.com/ugd/7e84b7_d6304a0c791b45efa212b11809d72a89.pdf?index=true
    • https://51da6a7d-ee05-4a49-87ee-1b74af3aeb07.filesusr.com/ugd/b80405_56a3a89f3812495e95b86d08825f26b1.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_off0000cc16.bin
266955556a0f62792fd6224af55e4df0bfc16d44f157ff72f5fd7653b32bc9d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC16 5364 bytes
font_01_sfnt_off0000ddda.bin
7e5b63c39e988fabe658cfbf873b725a1e6f3336fd7e8d53155c8debcc15b509		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDA 11696 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.