Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dc6b2a1ad757866…

MALICIOUS

PDF

34.1 KB Created: 2020-04-13 05:51:45 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2a2470dda221be4ab79ae2b240353a85 SHA-1: f87d3509f6e64937a8e26c06ba32c367e3a77a80 SHA-256: 6dc6b2a1ad75786663f8b9b94f2c432bd1748df39175cf62963d22ec76a9f254
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were explicitly extracted, the presence of numerous external URLs indicates a likely attempt to redirect users to potentially malicious content or phishing sites.

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://loto2019.site/uploads/1/3/0/3/130323212/130323212.html#beautiful+scandalous+night+lyrics+robbie+seay+band
    • http://dramaschoolcoach.com/uploads/1/3/0/2/130274330/79725cfd37.pdf
    • http://gapah.com/uploads/1/3/0/3/130324050/finenif_wifene.pdf
    • http://mrheff.com/uploads/1/3/0/3/130323478/nirub-lodiseg.pdf
    • http://xodessertsandbakery.com/uploads/1/3/1/4/131437247/8823fbf22a2496.pdf
    • http://michigancabinetmakers.com/uploads/1/3/0/6/130605406/1570599.pdf
    • http://studentmin.net/uploads/1/3/1/4/131438293/nuraxupodele_dowetomikur_pakobujojaneb.pdf
    • http://myfharefinance.com/uploads/1/3/0/7/130775518/76a7c79195cc57.pdf
    • http://arhshouse.com/uploads/1/3/0/7/130740455/3850414.pdf
    • http://findyourband.de/uploads/1/3/1/4/131453036/af889bb4.pdf
    • http://30dayfitfastchallenge.com/uploads/1/3/0/7/130776268/4765502.pdf
    • http://reikijparent.com/uploads/1/3/0/7/130739459/teloverojew-jatabamobapa.pdf
    • http://buckfinishes.com/uploads/1/3/0/2/130289494/436de78fcdbae07.pdf
    • http://edsites.ie/uploads/1/3/0/4/130476573/doxazamujejeberido.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000562b.bin
42478b93a1b1bc96f531a594546cba57a974ed92f2bff5c2ffc22b1ce48ce3c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x562B 7080 bytes
font_01_sfnt_off0000723b.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x723B 2652 bytes

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