Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa0078bdd66ea5c3…

MALICIOUS

PDF

72.7 KB Created: 2020-03-20 11:10:05 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 32727c82491b057a593ab2b6dade4179 SHA-1: a90a638c3687dbfa2001b45e9605ca0e61882d81 SHA-256: fa0078bdd66ea5c31791f7ed87823f59a2ac0a6efae023df16e4fd916e88752a
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a significant number of external links, many of which are numerically or generically named and hosted on unrelated domains, indicating a link farm or SEO manipulation tactic. The document body, though partially corrupted, contains a title related to gout ('Que tan mala es la enfermedad de la gota') and references wkhtmltopdf, suggesting it's a generated document. The primary purpose appears to be directing users to a network of external URLs, likely for malicious redirection or content delivery.

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://six10digital.com/uploads/1/3/0/8/130814284/130814284.html#que+tan+mala+es+la+enfermedad+de+la+gota
    • http://biancabonomolo.com/uploads/1/3/0/6/130604081/banopubo.pdf
    • http://graticise365.com/uploads/1/3/0/8/130813732/4893170.pdf
    • http://www.disabledandproudconference.org/uploads/1/3/0/6/130604750/gosuwojonivib-puzepovewisana.pdf
    • http://www.maysalespro.com/uploads/1/3/0/5/130589042/a9b9dfeeb5.pdf
    • http://anitadrummond-lpc.com/uploads/1/3/0/2/130270971/bajinubule-vazakevatedez.pdf
    • http://mcreator.org/uploads/1/3/0/8/130814874/cd81ffa2e.pdf
    • http://www.monasflowercafe.com/uploads/1/3/0/2/130272909/zisogidu-barob.pdf
    • http://leoinspired.com/uploads/1/3/0/6/130604158/7525152.pdf
    • http://dgaccountingtax.com/uploads/1/3/0/8/130813373/1825238.pdf
    • http://www.cheersoap.com/uploads/1/3/0/9/130969940/9611544.pdf
    • http://molexastucco.com/uploads/1/3/0/6/130621909/290d0bca.pdf
    • http://ataierp4k0wt0.butterfly520.com/uploads/1/3/0/6/130639448/7210210.pdf
    • http://derrelsofdothan.com/uploads/1/3/0/4/130483146/f7ae09cf31fa7bf.pdf
    • http://sustainabilitybusinessmanagement.com/uploads/1/3/0/6/130620337/logupejib_somumuwaxotimi_vomiruwep_xekubegape.pdf
    • http://carlamaebailey.com/uploads/1/3/0/4/130488935/wizurefu.pdf
    • http://wayneandbecca.com/uploads/1/3/0/7/130776541/zemigu-daduzaliv-xuzozenamaviwem-xiwanuf.pdf
    • http://bungleandbungle.com/uploads/1/3/0/7/130775522/gitowo_silatexomu.pdf
    • http://www.reddirtrubs.com/uploads/1/3/0/6/130620296/a3c39.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfec.bin
3e15e56b734783e49d18a6f49908334342a21ee69e3099c1348e1e511b243de4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFEC 10112 bytes
font_01_sfnt_off0000f401.bin
e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF401 2652 bytes
font_02_sfnt_off0000fd68.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD68 16036 bytes

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