Malicious PDF — malware analysis report

Static analysis result for SHA-256 00da4a08329deb58…

MALICIOUS

PDF

39.2 KB Created: 2020-03-27 09:25:27 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 3866603d07fd69dcf40b26bca0bb36d3 SHA-1: ced771fbbbffb899a20249e68459431190bb8307 SHA-256: 00da4a08329deb58305460978077cca8603ba829d3399caa100a27e5508db531
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains a title related to 'regla de sturges' and embeds URLs pointing to various domains. These URLs are likely part of a link farm or a phishing campaign designed to drive traffic to malicious content.

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://reconnecting-families.com/uploads/1/3/1/4/131413837/131413837.html#como+utilizar+la+regla+de+sturges
    • http://keepyourappointment.com/uploads/1/3/0/2/130272905/a5e2b.pdf
    • http://generationchurchworship.com/uploads/1/3/0/5/130589047/gawavedoxujaro_wofal_rurureviwuf.pdf
    • http://www.sugaringydney.com/uploads/1/3/0/6/130621856/lelak.pdf
    • http://hbmertz.com/uploads/1/3/0/5/130590219/bipabakosazoza_julel.pdf
    • http://borsate.com/uploads/1/3/0/8/130813669/mogeduwofuxe.pdf
    • http://saharaexchange.com/uploads/1/3/0/5/130539757/54fcf.pdf
    • http://nuelookhomes.com/uploads/1/3/0/6/130605258/duwoxi.pdf
    • http://www.sharedsuccesssolutions.com/uploads/1/3/0/2/130289679/rotimamoj-jesewipepo.pdf
    • http://lowermanhattanparents.net/uploads/1/3/0/5/130539612/2976561.pdf
    • http://neufeldvolk.com/uploads/1/3/0/6/130604165/6086161.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063a2.bin
a2f005346b21d12a96ee5670ae0a330b00b0b0e2a6558e78b79965d21cecf266		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63A2 8860 bytes
font_01_sfnt_off000083f1.bin
e2a609504f31aba74360c8f97aead3d8f97c76e888a653261413c8bef59e3205		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83F1 2884 bytes

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