Malicious PDF — malware analysis report

Static analysis result for SHA-256 019b353ef8442580…

MALICIOUS

PDF

45.5 KB Created: 2020-06-08 01:46:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5b7d55c3a0e77434272a093620abdd1 SHA-1: 83957d213dfdedec945b53ce2f2b8d856107f6e0 SHA-256: 019b353ef84425801c91467450fd2ee7d5668350f08148d36476c1ada27391b0
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many of which point to other PDF files hosted on similar domains. This behavior is indicative of a link farm or SEO manipulation tactic, often used to distribute malicious content or traffic. The ML classifier strongly supports the malicious nature of this PDF.

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://ecuriebarnton.com/uploads/1/3/0/4/130488543/130488543.html#reglas+en+servidor+de+error-acci%25C3%25B3n+d
    • http://nmcawomenscricket.com/uploads/1/3/1/4/131452771/5687408.pdf
    • http://farsightstyle.com/uploads/1/3/0/5/130590143/3131372.pdf
    • http://chemiqueadhesives.net/uploads/1/3/1/4/131437833/4670535.pdf
    • http://oradellmedcenter.com/uploads/1/3/0/2/130289226/db7755ff694f04.pdf
    • http://advantageprotocol.com/uploads/1/3/0/7/130739489/marinusumuxufuf_xivojob.pdf
    • http://autointeriorgroup.com/uploads/1/3/1/3/131383586/44b5096b.pdf
    • http://cbconservation.com/uploads/1/3/0/6/130604742/2483697.pdf
    • http://southerntouchdesignsandgifts.com/uploads/1/3/0/2/130289218/fegajekorugepufigaba.pdf
    • http://hostmaster.jessiesghost.com/uploads/1/3/0/5/130551249/kiposo.pdf
    • http://annabelleeugenia.com/uploads/1/3/1/4/131453459/vumokaguvuv.pdf
    • http://creedomclothing.com/uploads/1/3/0/5/130539913/3062329.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://supufusifiv.files.wordpress.com/2020/06/jusanajenaxatuzivare.pdf
    • https://radegatazu.files.wordpress.com/2020/06/22755997629.pdf
    • https://pojolukowo.files.wordpress.com/2020/06/70089321145.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008298.bin
5bd951249eb9fb2468e1cb8a2c1d92ba08793c8ec0cf02c0a794196ec1bffa55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8298 11380 bytes

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