Malicious PDF — malware analysis report

Static analysis result for SHA-256 392c8008c3ef834f…

MALICIOUS

PDF

37.1 KB Created: 2020-06-01 11:51:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a62752f4b6fb9dda3f697ad2ce540da SHA-1: 08e37e0766468124538edd6fe68f372f0b0922b3 SHA-256: 392c8008c3ef834fc9e0b29ad82586e4a1e841a323d9da7ebb12beb0b1fc1ffd
96 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, many of which point to other PDF files hosted on various domains. This behavior is indicative of a link farm or a mechanism to distribute further malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent to redirect users to potentially harmful resources.

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://undergroundrepresentatives.com/uploads/1/3/0/5/130588540/130588540.html#girl+interrupted+pdf+download
    • http://southfloridamp.com/uploads/1/3/1/4/131456012/0f21b8ce92.pdf
    • http://wccscorp.com/uploads/1/3/0/8/130874304/60346.pdf
    • http://cpanel.olympianeuro.com/uploads/1/3/1/4/131407855/xutibo_lulotezo_sujujol.pdf
    • http://premiumhdnow.net/uploads/1/3/0/7/130775171/bodiroba.pdf
    • http://manarafoundation.org/uploads/1/3/1/3/131380582/4299280.pdf
    • http://cfcpeniel.com/uploads/1/3/1/4/131453985/reredu_gapogivedol_siraki.pdf
    • http://worththewaitstaceydavidyountvilleca.com/uploads/1/3/0/3/130323996/5276262.pdf
    • http://hannahlewisphotography.com/uploads/1/3/0/3/130313178/wedekatujupix-vagut-gogereluxi.pdf
    • https://xarinigeted.files.wordp
    • https://tobedubokigu.files.wordpress.com/2020/05/76305364678.pdf
    • https://panezurazid.files.wordpress.com/2020/05/15785237424.pdf
    • https://baxojogu.files.wordpress.com/2020/05/maxefa.pdf
    • https://xarinigeted.files.wordpress.com/2020/05/22231924402.pdf
    • https://wowewuso.files.wordpress.com/2020/06/navewu.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_off00006639.bin
6907b2c003a20b1a1459d110d02c80c7d31354ed2f0736ab7a51aa054ee3f278		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6639 10068 bytes

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