Malicious PDF — malware analysis report

Static analysis result for SHA-256 24a1dcd918d20d28…

MALICIOUS

PDF

34.8 KB Created: 2020-06-13 03:40:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-10
MD5: 6d6d0f2db598b149a80f8464bd7495ad SHA-1: 0b0250da8a4b57e2012bfb171ede29eac59d03aa SHA-256: 24a1dcd918d20d28ba46158546c94026a0397bf567f898a6c51f6f6281f329cf
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to domains that appear to be part of a link farm. The heuristic 'PDF_SEO_LINK_FARM' indicates that the PDF is designed to generate traffic to these external sites. The document body contains garbled text but also includes URLs, reinforcing the link farm tactic. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://lookoutclub.net/uploads/1/3/0/5/130551302/130551302.html#hoja+rayada+tama%25C3%25B1o+carta PDF link annotation
    • http://nuwavelocs.com/uploads/1/3/0/5/130552017/voxafalo_wesekenuseral_wituvizaxepalo.pdfIn PDF document text
    • http://codbcontractors.com/uploads/1/3/0/4/130493968/jafitixazaza.pdfIn PDF document text
    • http://mossvalerotary.com/uploads/1/3/1/3/131379776/6914443.pdfIn PDF document text
    • http://sturenzondermacht.nl/uploads/1/3/1/4/131453336/korifunisano.pdfIn PDF document text
    • http://mrspalmer.org/uploads/1/3/1/4/131407011/xonasu-gabotuwexizine-nuratasodi.pdfIn PDF document text
    • http://southerntierpremiumdetailing.com/uploads/1/3/0/8/130814754/kuzajox-polog-vozoba.pdfIn PDF document text
    • http://cupncake.de/uploads/1/3/0/4/130483194/roxukexos_rudevewezasadad_zafis.pdfIn PDF document text
    • http://sacredsummitchocolate.com/uploads/1/3/1/4/131409074/6580235.pdfIn PDF document text
    • http://popup-nyc.com/uploads/1/3/1/3/131382486/nivusav_dopozigap_pigapujo.pdfIn PDF document text
    • http://bahamasaugustllc.com/uploads/1/3/1/4/131410939/9773237.pdfIn PDF document text
    • http://mta-sts.mail.meetthemessenger.com/uploads/1/3/0/9/130969221/2966009.pdfIn PDF document text
    • http://living-twenty.com/uploads/1/3/0/3/130313319/4849509.pdfIn PDF document text
    • http://jewelrybymoshe.com/uploads/1/3/0/6/130639915/vafirefudisa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://felibawexune.files.wordpress.com/2020/06/jowojavirodaraj.pdfIn PDF document text
    • https://bubejiruzer907982527.files.wordpress.com/2020/06/ganurolagonaduxat.pdfIn PDF document text
    • https://gaduxidido.files.wordpress.com/2020/06/kuxubujugivameguruveme.pdfIn PDF document text
    • https://webiragev583896337.files.wordpress.com/2020/06/74451606481.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
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

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_off0000588b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x588B 11376 bytes
SHA-256: 138cf87355016ec0d2d439c889dbbe963550f49d67c26e4346b01229d2345ca8

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