Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0ca1967ac46d883…

MALICIOUS

PDF

44.1 KB Created: 2020-03-25 10:10:22 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: b05c041d94caeba1787dfdd450d03afd SHA-1: 386e2b5f2393b5c82b9ca38d8ee84d7ee9b59771 SHA-256: a0ca1967ac46d883eba762d977e957ef2316d2a4ba97de32c6031b3311e34a48
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious. The document body contains garbled text and references to a Pokemon pokedex, suggesting a lure to disguise the malicious intent. The primary goal appears to be directing users to a vast network of linked websites, likely for SEO spam or to host further 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://insureapplewatch.com/uploads/1/3/0/3/130313049/130313049.html#pokemon+tabletop+united+pokedex+1.05+pdf PDF link annotation
    • http://fhloston-paradise.com/uploads/1/3/0/6/130620882/mimarorusenudos.pdfIn PDF document text
    • http://houstonghostwriting.com/uploads/1/3/0/7/130739034/775023.pdfIn PDF document text
    • http://www.victoriajadeparker.com/uploads/1/3/0/6/130621591/9207303.pdfIn PDF document text
    • http://sorayaattia.com/uploads/1/3/0/3/130323319/2738222a9.pdfIn PDF document text
    • http://ideasustainability.com/uploads/1/3/0/7/130775654/fffa1431955ec.pdfIn PDF document text
    • http://survive2life.com/uploads/1/3/0/7/130738513/cb4c14d336a18d.pdfIn PDF document text
    • http://www.candacegraham.com/uploads/1/3/0/6/130604105/c2666ddf6f.pdfIn PDF document text
    • http://clt-stories.com/uploads/1/3/0/5/130551668/4217942.pdfIn PDF document text
    • http://benjaminsmithfineart.com/uploads/1/3/0/7/130738641/rotafenoda-welubirubi.pdfIn PDF document text
    • http://camposdeprovence.com/uploads/1/3/0/5/130545733/2254201.pdfIn PDF document text
    • http://grafxmicro.com/uploads/1/3/0/4/130488512/zosukusadavexunif.pdfIn PDF document text
    • http://bloxy-shop.com/uploads/1/3/0/2/130289653/edba4.pdfIn PDF document text
    • http://carefreemaster.com/uploads/1/3/0/5/130550805/narilutetexub-sebizevowod-nemutaw.pdfIn PDF document text
    • http://stuffbysteff.net/uploads/1/3/0/4/130489727/vazitefekube_fusuriraredunek_venev.pdfIn PDF document text
    • http://kelbels.org/uploads/1/3/0/6/130604181/buwixuveg.pdfIn PDF document text
    • http://thetrumptroll.com/uploads/1/3/0/6/130603884/dedozex.pdfIn PDF document text
    • http://anchorchurchelpaso.com/uploads/1/3/0/3/130379204/16750e60e0.pdfIn PDF document text
    • http://ns.colourwizards.com/uploads/1/3/0/3/130313378/tufatareguvadanuwuto.pdfIn PDF document text
    • http://admin.electricalmaintenanceyorkshire.com/uploads/1/3/0/7/130776452/53ca4f42e66b4.pdfIn PDF document text
    • http://cocksplosion.com/uploads/1/3/0/6/130620546/3681550.pdfIn PDF document text
    • http://taran.vip/uploads/1/3/0/7/130776580/tuzegodaf_nuzovit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000077f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77F8 8504 bytes
SHA-256: e4afa735679215700cee5ba38036542c90db78b2fb97e8bb26396b87140943c5
font_01_sfnt_off0000988e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x988E 2732 bytes
SHA-256: 7863b829de04ea8b7f5be4d5dae43fa62182e7611f0c3a300d10b316d27db496

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