Malicious PDF — malware analysis report

Static analysis result for SHA-256 92dab98c5db9192b…

MALICIOUS

PDF

45.1 KB Created: 2020-04-03 08:13:34 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f83a2dcfe555638c00d799b6d591b1e5 SHA-1: f9a998194322372f68e66bfc3786abc0d317e5dd SHA-256: 92dab98c5db9192b57cd536cc1b13722d0f8b9098749a1414a70c4c71b3c5c1a
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by an ML classifier. It contains a large number of external links, many of which point to other PDF files on different domains. This behavior is consistent with a link farm or SEO manipulation scheme, which can be used to distribute malware or engage in phishing. No scripts were extracted from this sample, and the document body is heavily obfuscated.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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 http://marilusdesigns.com/uploads/1/3/0/9/130969639/130969639.html#mysql+stored+procedure+tutorial+for+beginners+pdf
    • http://platinumcleaningprofessionals.com/uploads/1/3/0/5/130538959/pafetilezefufom.pdf
    • http://best-cockapoo.com/uploads/1/3/1/4/131438640/nobazabejurezi-wosupa.pdf
    • http://havenlyorganizing.com/uploads/1/3/0/7/130776575/97884e0c93.pdf
    • http://ljzine.com/uploads/1/3/0/8/130814984/vopod-lunepofasafal-kikepuliro-bijusatukuwitu.pdf
    • http://bitethebaitfishing.com/uploads/1/3/0/7/130776312/fawafutodepoma.pdf
    • http://rgsquared.com/uploads/1/3/0/5/130546937/7b622f3eb0b.pdf
    • http://swimfunandfitness.com/uploads/1/3/0/8/130814177/jogalapubemasila.pdf
    • http://quityoulikemen.org/uploads/1/3/0/6/130639329/91bcca12e95a81.pdf
    • http://gasrewards.org/uploads/1/3/0/4/130483603/tivatozijonirex-bewigupolinijif-kuwovedop.pdf
    • http://colyarjewelry.com/uploads/1/3/0/7/130740374/8193745.pdf
    • http://vempraroca.com/uploads/1/3/0/3/130323520/fupudapo.pdf
    • http://sareegown.com/uploads/1/3/0/2/130291699/kigajefepo.pdf
    • http://theateroftruth.org/uploads/1/3/0/6/130620926/40eca5c1.pdf
    • http://esspelac.org/uploads/1/3/0/3/130313075/noranuwut-gosotezoke-fizisebuwe-dovomave.pdf
    • http://nabyou.com/uploads/1/3/0/9/130969236/lijixinilubol.pdf
    • http://jwalpinesports.com/uploads/1/3/0/6/130639802/liluzuvimawo.pdf
    • http://williammoreing.com/uploads/1/3/1/3/131382239/volujuvi_peveporo.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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008571.bin
af4ab8d98b798efb05d5b05bde568f0ff8b6a669c15b94b71e735f047a1ded2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8571 8664 bytes

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