Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e0d56e11be3127c…

MALICIOUS

PDF

75.8 KB Created: 2020-04-26 08:49:13 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 8fc1667bad9b7aeab8b4335b98a520bc SHA-1: 59a8663646135ec186619e935d537b0d54a605bb SHA-256: 4e0d56e11be3127c4a036ca7a3cb499ccec2c04d220c113bbf51703b5d2779d7
96 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, a technique often used to inflate search engine rankings or redirect users to malicious sites. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly indicates the document's content is designed to deceive users with promises of prizes or funds, requiring them to take further action, such as clicking on the provided links. The presence of numerous unknown URLs supports this, suggesting a link farm or redirection mechanism for the scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://joshleephotojournalist.org/uploads/1/3/0/6/130639165/130639165.html#oscilloscope+kit+for+android PDF link annotation
    • http://lafolie.net/uploads/1/3/0/5/130590467/6a399b.pdfIn PDF document text
    • http://mwishs.com/uploads/1/3/0/5/130550903/4810732.pdfIn PDF document text
    • http://kuddoodles.com/uploads/1/3/1/3/131398443/13051c65.pdfIn PDF document text
    • http://successwithchelsea.com/uploads/1/3/0/3/130323707/8651551.pdfIn PDF document text
    • http://mta-sts.contracostachristianschools.org/uploads/1/3/1/1/131164234/6790718.pdfIn PDF document text
    • http://stayinluquillo.com/uploads/1/3/1/6/131607505/delenivikobazub_witan_zetugeb_duzin.pdfIn PDF document text
    • http://oceancitymattress.com/uploads/1/3/0/9/130969922/xisos_lizepifoxevapel_pefanidirijel_logokiso.pdfIn PDF document text
    • http://flysamba.com/uploads/1/3/0/7/130739315/rabemux.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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE442 8192 bytes
SHA-256: ca6e1953715411242a978ab627ae392873c8f2c4b004037cc26938b6ea2e0fe9
font_01_sfnt_off000103ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103EC 2820 bytes
SHA-256: 02f1acad596d7effe906465fb9560ec4b836a52afa26b4154410b47c5abd4cf4
font_02_sfnt_off00010dce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DCE 16036 bytes
SHA-256: 779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63