Malicious PDF — malware analysis report

Static analysis result for SHA-256 57dab178733b132f…

MALICIOUS

PDF

39.1 KB Created: 2020-06-14 16:44:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee021754e707d2b1fdb0aafcad2b0a5c SHA-1: d780b4360739426980142529bbd5e03c65b8438a SHA-256: 57dab178733b132fd7489540202f58f0b89e73520ec68dd147e444632f355e61
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection tactic. The embedded document body text is largely garbled but contains a URL that aligns with the findings. No scripts were extracted from this sample, limiting the ability to determine specific payload delivery mechanisms. The ML classifier strongly indicated maliciousness.

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://web4umarketing.com/uploads/1/3/0/5/130544230/130544230.html#lic+jeevan+saral+atm+plan+chart+pdf
    • http://prestigepayeeservices.org/uploads/1/3/0/3/130313495/1290754.pdf
    • http://tbcrandy.com/uploads/1/3/0/5/130588786/gubokadesemagazisaw.pdf
    • http://147east.com.au/uploads/1/3/0/5/130590664/suwipewudizabag-gekesevuwifutid-nekumadavukel-disegenulaxe.pdf
    • http://mta-sts.mail.henryssports.com/uploads/1/3/0/7/130776885/2022362.pdf
    • http://mihempfest.com/uploads/1/3/0/3/130323318/werufopuju.pdf
    • http://correllenterprises.biz/uploads/1/3/1/4/131438835/3759383.pdf
    • http://francofencingnconcrete.com/uploads/1/3/0/7/130739936/fenuwokevirobolodo.pdf
    • http://zerwin.com/uploads/1/3/0/9/130969177/linupaziro.pdf
    • http://wscreativeportfolio.com/uploads/1/3/1/3/131384055/4871571.pdf
    • http://74-123-78-212.mgwnet.com/uploads/1/3/0/5/130539373/zepazakutuzitum.pdf
    • http://cpanel.fetefam.com/uploads/1/3/0/6/130621214/gekokonojuwu.pdf
    • http://thehiphopsutra.com/uploads/1/3/1/4/131452987/torara.pdf
    • http://ipmofwa.com/uploads/1/3/1/4/131453170/kuxid_mebuxunigimimu.pdf
    • https://jakasizox.files.wordpress.com/2020/06/97734002177.pdf
    • https://tujirejon.files.wordpress.com/2020/06/34902245000.pdf
    • https://sogifefuve684083845.files.wordpress.com/2020/06/watavipenidixaxegusim.pdf
    • https://xaxodezirona.files.wordpress.com/2020/06/pemekapimojefogugot.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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bfb.bin
c1baa718d170528641aed8fc3cd5cc32a27dfc80986d0c74d3e33b08767e6798		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BFB 10744 bytes

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