Malicious PDF — malware analysis report

Static analysis result for SHA-256 28e520f50c3eee8f…

MALICIOUS

PDF

73.9 KB Created: 2021-03-06 22:47:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 221708171373d2c0c00476bebd021c14 SHA-1: 1ea0b8515497df8ab19e15e33c21fc8b76546c79 SHA-256: 28e520f50c3eee8fe51d614ec3c8cebb585bdc9dbdddeceae4368b79ecd2e1d2
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://druttle.ru/wix?keyword=dedo+pulgar+de+la+mano PDF link annotation
    • https://lefazevi.weebly.com/uploads/1/3/0/8/130873710/nawipug.pdfIn PDF document text
    • https://wemezixogasowed.weebly.com/uploads/1/3/1/6/131637562/9031720.pdfIn PDF document text
    • http://masovizifuzaro.iblogger.org/1745856459.pdfIn PDF document text
    • http://wijasagasipode.getenjoyment.net/futozesuremaxovekumopabo.pdfIn PDF document text
    • http://kopuvimu.scienceontheweb.net/zivupadenox.pdfIn PDF document text
    • http://pazadixokumox.sportsontheweb.net/suncast_hosemobile_garden_hose_reel_cart.pdfIn PDF document text
    • https://fuxugikitoze.weebly.com/uploads/1/3/1/0/131070560/xepoxejuxitu.pdfIn PDF document text
    • http://pogawubujogeje.mypressonline.com/martin_heidegger_summary.pdfIn PDF document text
    • http://viwudij.22web.org/gazivogimadibigopibi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e148473a-3d1a-46f8-b788-fbc1f5af68d4.filesusr.com/ugd/e1e70b_034b4a387e1e4f9488e72f985cc1e2bd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/zujifasewinilawedureverad.pdfIn PDF document text
    • https://0d3c4653-ec4b-4b04-9c20-59e348ba858e.filesusr.com/ugd/62200f_2d985f0f4a3648d193d2a0bf1a7b6104.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/jenufo.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/banded_iron_formation_minnesota.pdfIn PDF document text
    • https://c0b8f06b-4e98-4d3d-89ef-2f08caba629a.filesusr.com/ugd/0c8cc8_ba19f0636a824f95b515b2ba4881eb13.pdf?index=trueIn PDF document text
    • https://ab25a8b3-4d80-4d4b-93a1-c1347014fa7c.filesusr.com/ugd/8d0191_a28df336a47940bfaf13b7c96df39005.pdf?index=trueIn PDF document text
    • https://2f60c0de-bae8-48d8-8f3f-ce7907f87c52.filesusr.com/ugd/badafb_b64a165514b04bcb95805d83dd8ae893.pdf?index=trueIn PDF document text
    • http://dozirojaj.rf.gd/76786812355.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE470 5100 bytes
SHA-256: 9d6773dcc3ae5dd994e09fa7e37c97a3eb8b662d13ff670a2ee344a97c9ff5e9
font_01_sfnt_off0000f5b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B6 10960 bytes
SHA-256: f7af5bb5fda28d2e86e9da1b3e67a76d3fa762be06e37f711d253dac0150f5aa