Malicious PDF — malware analysis report

Static analysis result for SHA-256 3874682c1045abd2…

MALICIOUS

PDF

33.9 KB Created: 2020-05-14 16:44:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 48168d6733d345b29c2a26d1b33aa2da SHA-1: 80bc2dc17796fd96f4acb8775c8c785ca5a1c89b SHA-256: 3874682c1045abd2d1284bf89b1b6dfab54b5d675e8cf92cdbdf675f45099d39
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or SEO manipulation tactic. The document body contains a mix of obfuscated text and URLs, including 'http://arzum01adanali.com/uploads/1/3/1/0/131069898/131069898.html#cara+mudah+membuat+carousel+di+android+studio', which is likely a lure. The primary goal appears to be directing users to a network of external resources.

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://arzum01adanali.com/uploads/1/3/1/0/131069898/131069898.html#cara+mudah+membuat+carousel+di+android+studio PDF link annotation
    • http://kdcmech.com/uploads/1/3/1/3/131397930/nepinuzinojenerizona.pdfIn PDF document text
    • http://fourcornercollectables.com/uploads/1/3/0/4/130483074/9baeb0892e6.pdfIn PDF document text
    • http://triagemgt.com/uploads/1/3/1/4/131453274/7857c09e043.pdfIn PDF document text
    • http://thereadingadvicehub.org/uploads/1/3/0/6/130621583/95bd07c2a20444.pdfIn PDF document text
    • http://openingtopassion.com/uploads/1/3/0/5/130589219/siwuw-gakamelimov-jasatusadiz-rigugewuzimo.pdfIn PDF document text
    • http://usapplesupport.co/uploads/1/3/0/3/130323465/7cd3e73067.pdfIn PDF document text
    • http://universeoftoronto.com/uploads/1/3/1/1/131163904/7733917.pdfIn PDF document text
    • http://tonylenta.net/uploads/1/3/1/4/131453018/mapamunevulonaf.pdfIn PDF document text
    • http://nfl-fan.com/uploads/1/3/0/3/130313127/zejimano.pdfIn PDF document text
    • http://mchoopfest.org/uploads/1/3/0/6/130620945/kupajuxi.pdfIn PDF document text
    • http://kristelbecares.com/uploads/1/3/1/4/131483128/5fc40af1694.pdfIn PDF document text
    • http://mdcspa.com/uploads/1/3/1/6/131637035/vurow.pdfIn PDF document text
    • http://sweettoothdiary.com/uploads/1/3/0/2/130273623/gesagos_pebewonelosow_samitowibib_pesosezor.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000547b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x547B 11296 bytes
SHA-256: 265c321a1c078a4357d2b52a376d8b3ee60cf3a8ca8adaf285be1e1877162e80