Malicious PDF — malware analysis report

Static analysis result for SHA-256 63f13a1a8caf2271…

MALICIOUS

PDF

42.6 KB Created: 2020-04-08 11:07:01 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-04
MD5: f8b55b1d2909c9114937f08cfc6d888a SHA-1: 6556b31efbd5934c4571d12c54855f10d79137d4 SHA-256: 63f13a1a8caf227143fb6b992184efd8a70d2efa67d2268cb208a187d0ebd49f
96 Risk Score

Malware Insights

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

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 spam campaign. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the embedded links indicates a malicious intent to redirect users to potentially harmful content.

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://tcsonline.net/uploads/1/3/0/6/130621649/130621649.html#1st+to+die+2003+cast PDF link annotation
    • http://saltyblondehair.com/uploads/1/3/0/6/130621248/8167953.pdfIn PDF document text
    • http://birthglow.com/uploads/1/3/0/2/130289663/11b0e9f40e8fa02.pdfIn PDF document text
    • http://elliejames1.com/uploads/1/3/1/4/131438468/wolifenot_lulifazadu_levasiwude_zoguzepubuteru.pdfIn PDF document text
    • http://craftanddesignmarket.com/uploads/1/3/0/4/130483836/vuxetire.pdfIn PDF document text
    • http://marker29design.com/uploads/1/3/1/3/131379591/tekagoperejuvom.pdfIn PDF document text
    • http://nothingbuttservicerealty.com/uploads/1/3/0/6/130620538/doreliz_desatekife_xajamatu.pdfIn PDF document text
    • http://strawberrycookienv.com/uploads/1/3/0/6/130620478/1811377831f2.pdfIn PDF document text
    • http://cglewis.com/uploads/1/3/1/3/131379295/zepitusepegijajagibi.pdfIn PDF document text
    • http://simpleshader.com/uploads/1/3/0/3/130323196/649238f54be8.pdfIn PDF document text
    • http://rockinrquarterhorses.com/uploads/1/3/1/0/131069738/fegisif-lebakebomibozu-wafupeviripujix.pdfIn PDF document text
    • http://bostercastle.com/uploads/1/3/0/2/130288511/xumopa_kudafezesarele_jipovuwu_nebivaf.pdfIn PDF document text
    • http://whitcombhomeinspections.com/uploads/1/3/0/6/130604690/lovevapar.pdfIn PDF document text
    • http://iscremodeling.com/uploads/1/3/0/4/130476004/ad84cdf4fc3c43.pdfIn PDF document text
    • http://letschocolati.in/uploads/1/3/1/3/131380759/vofuditamogirogakuze.pdfIn PDF document text
    • http://fytfitness.net/uploads/1/3/0/2/130270843/7adbb60.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000746a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x746A 7960 bytes
SHA-256: 0a2705515e24da9050fa9d93384fc0637ba6c52d1502ff50910b563bf2456cdd
font_01_sfnt_off00009387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9387 2652 bytes
SHA-256: 1b3f82cd74c5b6671cc0c0d4a6c7877b74bb57ca469b2a61ef541918e41af838

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