Malicious PDF — malware analysis report

Static analysis result for SHA-256 d68a64f59bd66b9c…

MALICIOUS

PDF

62.8 KB Created: 2020-03-30 02:12:20 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 187343af5e7a9cfadf216a40a4692f7e SHA-1: f98cc61a2f260295be07e25ff30893a878229623 SHA-256: d68a64f59bd66b9c6ce189a164bc984e0dea04c5cf75f247bb283017a1dad436
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO spam or to distribute malicious payloads. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the sheer volume of outbound links suggests a malicious intent to redirect the user to potentially harmful content hosted on numerous domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://thehappygirlstore.com/uploads/1/3/0/7/130775753/130775753.html#john+dewey+school+and+society
    • http://bodaciousmonet.com/uploads/1/3/0/8/130874509/kotafolanese.pdf
    • http://garrett-mills.com/uploads/1/3/0/6/130605275/dcaa7317.pdf
    • http://remaxsellshomes.com/uploads/1/3/0/7/130739188/desagiwewi.pdf
    • http://lotwstudy.com/uploads/1/3/0/7/130775400/02493.pdf
    • http://bakerlawga.com/uploads/1/3/0/8/130873843/3563415.pdf
    • http://miguelitos.org/uploads/1/3/0/5/130539987/5466105.pdf
    • http://impastocaters.com/uploads/1/3/0/2/130270893/98e089f7.pdf
    • http://bryantparislaw.com/uploads/1/3/0/4/130435791/bolati.pdf
    • http://cornellcraigue.com/uploads/1/3/0/7/130775347/fesuru.pdf
    • http://ohiopedologist.com/uploads/1/3/0/6/130621429/xevoburoded-kejosexuzomu.pdf
    • http://mochex.com/uploads/1/3/0/4/130488288/rifabopovuxegavapasa.pdf
    • http://annamayes.info/uploads/1/3/0/5/130588559/jenegi.pdf
    • http://domperopdefeestvreugde.be/uploads/1/3/0/6/130603889/9314374.pdf
    • http://bobpowelltattoo.com/uploads/1/3/0/5/130543588/xizuduz.pdf
    • http://byajin.com/uploads/1/3/1/1/131163836/2122243.pdf
    • http://minaskincare.com/uploads/1/3/0/5/130544232/6601245.pdf
    • http://ozarkdalecountyhumanesociety.com/uploads/1/3/0/7/130776757/pajarafixilamenotaw.pdf
    • http://jabugotours.com/uploads/1/3/0/5/130551124/adc42a.pdf
    • http://archebiosis.com/uploads/1/3/0/5/130545098/tosugazes.pdf
    • http://360teamllc.com/uploads/1/3/0/2/130274281/kupaponas.pdf
    • http://vacuumrepairkelowna.com/uploads/1/3/0/4/130476458/subel_kebiwuvuduw_duwafuwogape_sizakugek.pdf
    • http://bucephalustactical.com/uploads/1/3/0/3/130379319/nofabumutesapa_wadoxe_tozorajuzewafuw.pdf
    • http://bakermansbeatshop.com/uploads/1/3/0/6/130604018/7381688.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b647.bin
fa01f20df35b3fa6ac76e8e5732529d3680e82519183d27d7ed2a359e869b0e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB647 10092 bytes
font_01_sfnt_off0000da3a.bin
dd264852f8991ab054e6cafd9fe5d25c64a41bddb57dc62003fdf3d1d5b5c2ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3A 5780 bytes

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