Malicious PDF — malware analysis report

Static analysis result for SHA-256 62be851b0e826f96…

MALICIOUS

PDF

40.9 KB Created: 2020-03-15 00:07:52 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 62cc07cee2720e00a81ed68c2dbffa77 SHA-1: 201b572fb2b3a3a35a7fcb82ef39b3c995ffd251 SHA-256: 62be851b0e826f96c0ec59a6a1a5fb32e20c2b8c957b8213cf7e8e8146b22c8f
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, masquerading as an internal meeting template, to various websites. The ML classifier strongly indicates maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm designed to direct users to potentially malicious content. While no scripts were explicitly extracted, the nature of the links suggests a phishing or content-luring attack.

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://a1209599xstreamtravel.xsideas.com/uploads/1/3/0/8/130874667/130874667.html#internal+kickoff+meeting+template
    • http://beyondbougiboutique.com/uploads/1/3/0/3/130313089/261023.pdf
    • http://riverfallsbaseball.com/uploads/1/3/0/2/130272586/1271735.pdf
    • http://boltprogram.com/uploads/1/3/0/6/130639073/toravejomav_xozavix_mibubesibifis.pdf
    • http://www.ms-holly-hagman.com/uploads/1/3/0/5/130550858/maxalabu.pdf
    • http://allianceoneconstruction.com/uploads/1/3/0/4/130493143/wunelugab-melikosoxodo.pdf
    • http://dimwit.biz/uploads/1/3/0/4/130489172/bokor.pdf
    • http://sbtopics.com/uploads/1/3/0/5/130588657/ravujo_kekatomipexu_duvufokezikopad_wilaxilelunobu.pdf
    • http://pandlexpress.com/uploads/1/3/0/4/130483679/vadodowutufalosi.pdf
    • http://ninjaproxies.info/uploads/1/3/0/3/130323620/nudem_wapamokaj_bovowovuke_jaziz.pdf
    • http://www.carenciayoga.com/uploads/1/3/0/7/130740533/7530735.pdf
    • http://motorheadtv.com/uploads/1/3/0/5/130551303/naribojidogepo_fuxemarulowaruv_ritepu.pdf
    • http://jglasergifts.com/uploads/1/3/0/4/130435842/kumiwu.pdf
    • http://ckfacials.com/uploads/1/3/0/5/130589399/23861f.pdf
    • http://theindmusicnetwork.com/uploads/1/3/0/3/130323421/8715626.pdf
    • http://www.lucien.earth/uploads/1/3/1/1/131164011/tijipexezo_zuginepopitabuj_vipedenepofus_zerajorun.pdf
    • http://theaustraliancraftdrinkscompany.net/uploads/1/3/0/6/130639259/dufon.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_off000076a4.bin
23a9f6eb83d31317b1186855c26f868c412d96dbd0da5539cf379f783f18d029		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76A4 7768 bytes

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