Malicious PDF — malware analysis report

Static analysis result for SHA-256 68d0216261f6ef1c…

MALICIOUS

PDF

69.3 KB Created: 2020-03-29 07:49:31 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 8f968b5891af1b25ea99f06e20321a95 SHA-1: 63602588e8fbd4f175aaf1a22f122b9e721b93b4 SHA-256: 68d0216261f6ef1c19ff2ef4757f1c4239e4ab5843572a91d17d071239a3ef89
96 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified by the 'PDF_SEO_LINK_FARM' heuristic, suggesting a link farm or phishing campaign. The document body, though heavily obfuscated, contains a URL that points to a resource related to 'modelo nomina empleada hogar 2018', indicating a potential lure for users seeking employment or financial information. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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://gomriz.com/uploads/1/3/1/4/131438127/131438127.html#modelo+nomina+empleada+hogar+2018
    • http://hurstwoodclinic.com/uploads/1/3/0/8/130813030/3f6db238.pdf
    • http://englishforlifeinfo.com/uploads/1/3/0/7/130739732/telozenusifale.pdf
    • http://mommysketchcomedy.com/uploads/1/3/0/5/130588920/xafilu_semoluvigu_wipopofobox.pdf
    • http://thekatebeyond.com/uploads/1/3/0/5/130551941/rezepexizume_mudurukerekopa_wexitifu.pdf
    • http://abnetconstruction.com/uploads/1/3/0/3/130379409/959504.pdf
    • http://classycases.co.uk/uploads/1/3/0/3/130313507/buwuxafawoverob.pdf
    • http://www.aglup.ca/uploads/1/3/0/6/130604612/wofadewek-rovametofowet.pdf
    • http://greenlightpva.com/uploads/1/3/0/9/130969506/860ecf2bd4c5a.pdf
    • http://louromartinsadvogados.pt/uploads/1/3/0/5/130540664/mizujuvagexeresav.pdf
    • http://utpb.me/uploads/1/3/0/7/130776225/337579.pdf
    • http://dexigent.com/uploads/1/3/0/4/130435633/dfc47e0.pdf
    • http://turnkeycompassion.com/uploads/1/3/0/2/130274169/b580925.pdf
    • http://controlledwatersolutionz.com/uploads/1/3/0/5/130551564/vureberukemowi.pdf
    • http://calaveraswines.org/uploads/1/3/0/5/130588579/denanizofoleb_tuzetitasufati.pdf
    • http://bshk.hklss.hk/uploads/1/3/0/4/130483866/722050.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_off0000e26b.bin
8d59e858e1d441468c372829056b94537efa0f2dc39d051e2cc43c0a0aa50421		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE26B 10060 bytes

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