Malicious PDF — malware analysis report

Static analysis result for SHA-256 19a07505262daffe…

MALICIOUS

PDF

41.2 KB Created: 2020-03-16 05:16:47 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0385d117c3263c2cbd6b640ee9db8618 SHA-1: 3d895bc918853c8bb0ec2b3c7637c90342fdc117 SHA-256: 19a07505262daffe403eb77966c498b0d10c5861739ea481cd9ea1487cd3e380
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, indicating a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of numerous external URLs suggests the document is designed to redirect users to potentially harmful websites, possibly to host further malicious content or phishing pages.

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://www.jazzmoondogs.com/uploads/1/3/0/5/130589171/130589171.html#arupu+audio+song+free
    • http://abacobahamashurricanerelief.org/uploads/1/3/0/2/130292098/junedotine.pdf
    • http://tbarandelahairstudio.com/uploads/1/3/0/7/130776629/xexotufagonot-dalerixuw-lunuxagegigawe-suwize.pdf
    • http://www.weddingdjoxfordshire.com/uploads/1/3/0/7/130776046/bukopokavofegigobiki.pdf
    • http://djsmithy.co.uk/uploads/1/3/0/4/130479472/jonikakinixiwe.pdf
    • http://www.bhofficefurniture.net/uploads/1/3/0/7/130739489/9043863.pdf
    • http://myhempisbomb.com/uploads/1/3/0/7/130739715/nagaji.pdf
    • http://thelanguagefinder.com/uploads/1/3/0/2/130288565/tirewasozagakoxexo.pdf
    • http://titleprotn.net/uploads/1/3/0/6/130605517/gotogexunada.pdf
    • http://www.katie-louweddings.com/uploads/1/3/0/7/130739462/295122f.pdf
    • http://mail.wact.org/uploads/1/3/0/6/130620519/xumupafuperuwelam.pdf
    • http://webofconnection.com/uploads/1/3/0/3/130324270/tawer.pdf
    • http://transenergy.us/uploads/1/3/0/9/130969838/5697948.pdf
    • http://mta-sts.southbeacharts.org/uploads/1/3/0/5/130590482/wanetojodoxo.pdf
    • http://khushalishah.net/uploads/1/3/0/8/130814186/7caa7ef36.pdf
    • http://earthtoolooney.co/uploads/1/3/0/5/130550736/rilinerogebezelake.pdf
    • http://www.goodgets.com/uploads/1/3/0/5/130588644/kokasupelezu_nifizat.pdf
    • http://www.maximuseneca.com/uploads/1/3/0/2/130287495/9330564.pdf
    • http://gottusshired.com/uploads/1/3/0/3/130313378/wonegimoxux-tininetimamo.pdf
    • http://centreelmos.com/uploads/1/3/0/6/130621100/5893540.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_off000077df.bin
4b1f7fff8a668955eb964bee9cd1f6a1cecd58229db13b8e66fc0c9c3296400f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77DF 8352 bytes

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