Malicious PDF — malware analysis report

Static analysis result for SHA-256 034d9cfdf8ae8c38…

MALICIOUS

PDF

50.3 KB Created: 2020-06-04 00:03:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82d2d9e42d843f45382d8cc255227688 SHA-1: 562b4a332f8233b6f5544738406a2195068dba1e SHA-256: 034d9cfdf8ae8c389ef655f9d3d89728a1abd97b2beb921887184252febf0483
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection scheme. The document body, though partially corrupted, contains URLs that are likely part of this scheme. The ML classifier strongly indicates maliciousness, and the presence of many external links points towards an attempt to direct users to potentially harmful websites.

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://adsl-63-204-18-18.benefitplans.org/uploads/1/3/1/3/131381259/131381259.html#the+tarot+of+the+bohemians
    • http://northcoastmedicalplaza.com/uploads/1/3/0/6/130604744/1818376.pdf
    • http://colleenphelonhall.com/uploads/1/3/0/8/130874073/dc2d66b57067ca.pdf
    • http://webmail.iolascott.com/uploads/1/3/0/7/130739240/1473971.pdf
    • http://newedgepartners.com/uploads/1/3/0/2/130289427/bevuzevasakur_lumudakutojap_dupikapazo.pdf
    • http://legendarypearlsgala.org/uploads/1/3/0/6/130603756/98c354b6a533b.pdf
    • http://prism-analytics.com/uploads/1/3/0/7/130740012/9070740.pdf
    • http://hempireoflove.com/uploads/1/3/0/5/130551298/fudateserowiku.pdf
    • http://triciawackerly.com/uploads/1/3/0/6/130620677/8972153.pdf
    • http://lancashireplant.net/uploads/1/3/0/2/130288552/lelejogujo.pdf
    • http://whatthehulla.net/uploads/1/3/2/3/132302720/9395822.pdf
    • http://maywood.eesforjobs.com/uploads/1/3/1/4/131483068/3115166.pdf
    • http://webdisk.stevenpaulsalon.com/uploads/1/3/1/3/131382808/dumiweleno_fadoxipopo_nelupafa_rujepigu.pdf
    • http://adsl-63-204-18-18.benefitplans.org/uploads/1/3/1/3/131381259/terms.html
    • http://adsl-63-204-18-18.benefitplans.org/uploads/1/3/1/3/131381259/dmca.html
    • http://adsl-63-204-18-18.benefitplans.org/uploads/1/3/1/3/131381259/policy.html
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://legilabetir.files.wordpress.com/2020/06/60768845975.pdf
    • https://raroxek.files.wordpress.com/2020/06/8903818682.pdf
    • https://vetaxuvewaf.files.wordpress.com/2020/06/1151641689.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000098e1.bin
8c996dd84d73fc809a59b3a4e38b28d17a868714bf4830f5619f07182c6a8f02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98E1 10580 bytes

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