Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4da91720a8be295…

MALICIOUS

PDF

45.3 KB Created: 2020-03-23 16:25:40 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 545a8c30c14d7c50d5bc07bd68e6c8d4 SHA-1: 9cbd83c0995e5af870540e620fcf0c524a8e9c5e SHA-256: f4da91720a8be2955fdcc4b66ae3a8d35a977fe5a4b89740ab5b7d2cbbaf0c10
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 to other PDF files hosted across numerous domains. This pattern is indicative of a link farm or SEO spam campaign, designed to drive traffic or distribute malicious payloads. The document body contains garbled text and a reference to 'Juegos de rally para niños gratis', suggesting a lure to attract users. No scripts were extracted, and the primary malicious activity appears to be the mass distribution of links.

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://studiopapillons.com/uploads/1/3/0/2/130272364/130272364.html#juegos+de+rally+para+ni%C3%B1os+gratis PDF link annotation
    • http://opheliabowen.com/uploads/1/3/0/4/130477372/1629843.pdfIn PDF document text
    • http://mail.villasundream.ch/uploads/1/3/0/6/130604542/8d89401df3dd.pdfIn PDF document text
    • http://dira-hotels.com/uploads/1/3/0/2/130272442/naguzavakota.pdfIn PDF document text
    • http://msldtinstitute.com/uploads/1/3/0/3/130323324/sorew.pdfIn PDF document text
    • http://sibtender.net/uploads/1/3/0/6/130603922/zufedemimor.pdfIn PDF document text
    • http://professionalmaintenance.org/uploads/1/3/0/7/130740483/7563600.pdfIn PDF document text
    • http://sarahewoodphd.com/uploads/1/3/0/8/130874317/3150312.pdfIn PDF document text
    • http://ohmtaxi.com/uploads/1/3/0/4/130436441/zorinunalam.pdfIn PDF document text
    • http://rachelanderson.info/uploads/1/3/0/7/130739312/vexute.pdfIn PDF document text
    • http://beta.thelittlestangel.com/uploads/1/3/0/7/130739916/dizanuligoje.pdfIn PDF document text
    • http://www.angrybullproductions.com/uploads/1/3/0/4/130483781/befepizisuli.pdfIn PDF document text
    • http://cpanel.yourasheville.com/uploads/1/3/0/6/130621071/rutemomubef.pdfIn PDF document text
    • http://mail.logosmetrolink.com/uploads/1/3/0/2/130271013/newositovesimu.pdfIn PDF document text
    • http://drjohnlightfoot.com/uploads/1/3/0/3/130323291/6927327.pdfIn PDF document text
    • http://webdisk.s-97.com/uploads/1/3/0/5/130588276/rupedoxadewejew.pdfIn PDF document text
    • http://rlsheetmetalllc.net/uploads/1/3/0/5/130590475/11852af59.pdfIn PDF document text
    • http://alsant.com/uploads/1/3/0/6/130604757/tegisajovofurogo.pdfIn PDF document text
    • http://www.ajolfiristorazione.it/uploads/1/3/0/4/130483527/xarebasogabugi_zivoraxo.pdfIn PDF document text
    • http://skylight24.com/uploads/1/3/0/7/130775911/noxavopa.pdfIn PDF document text
    • http://thematthewaffair.com/uploads/1/3/0/6/130621060/ba515a.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
🗂 Part of campaign: petsingoodhealth.com 3 samples

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000085a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85A1 8768 bytes
SHA-256: e9e02d2fbaf1f85a2966029a7ff23ac15e785b76d16394cd1c5e5aa469b7c0e2

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