Malicious PDF — malware analysis report

Static analysis result for SHA-256 064e18c3944cf819…

MALICIOUS

PDF

52.8 KB Created: 2020-04-12 11:48:42 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-25
MD5: 725b9b4d2fe6481e32776b9a75932115 SHA-1: 7d845083e0265d0de7d11e96baff6c768e2340f2 SHA-256: 064e18c3944cf8190a585ab6b23c739c8b5faaa9a32ccaba35177d34cd8a9614
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many with numeric slugs, indicative of a link farm or SEO spam campaign. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external URLs suggests an attempt to redirect users to potentially harmful content. The document body, though partially corrupted, contains text related to English verb tenses, likely a lure to attract clicks.

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://lionheartlivearts.org/uploads/1/3/0/5/130551125/130551125.html#tiempos+verbales+en+ingles+con+formulas PDF link annotation
    • http://hotellable.com/uploads/1/3/1/0/131070612/bapazelumagoga_fetodunoxegin.pdfIn PDF document text
    • http://justinsochoka.com/uploads/1/3/1/4/131408529/9411232.pdfIn PDF document text
    • http://adiahope.com/uploads/1/3/0/4/130476525/nunaz.pdfIn PDF document text
    • http://stresslessbreath.com/uploads/1/3/1/3/131380390/2251332.pdfIn PDF document text
    • http://ptrevitalize.com/uploads/1/3/0/4/130488158/betatixaxenuw.pdfIn PDF document text
    • http://brave-lifestyle.com/uploads/1/3/0/2/130288394/zepibumewi.pdfIn PDF document text
    • http://docbwell.com/uploads/1/3/0/5/130588601/e50abd92044dac.pdfIn PDF document text
    • http://menrissul.org/uploads/1/3/0/7/130776498/9810549.pdfIn PDF document text
    • http://stgeorgescentreleeds.org/uploads/1/3/0/6/130604546/1588517.pdfIn PDF document text
    • http://1800laborers.com/uploads/1/3/0/8/130874599/xovivuwevemixeliz.pdfIn PDF document text
    • http://alleyrawwproductions.com/uploads/1/3/0/4/130489771/89b033f1f84a.pdfIn PDF document text
    • http://photosbyjessicabowman.com/uploads/1/3/0/7/130776458/sufijob_meduxekegine_fevenibaledet.pdfIn PDF document text
    • http://babymyo.com/uploads/1/3/0/7/130738913/zajevarojonew_tedaren.pdfIn PDF document text
    • http://developtransformimprove.com/uploads/1/3/0/7/130776076/7974264.pdfIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000081be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81BE 10268 bytes
SHA-256: 8b0d9a2bb95c53b46e239b6b469c391083758f5febb49f14922a996717afdffb
font_01_sfnt_off0000a601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA601 1708 bytes
SHA-256: 83459e82cebe561b9e65dda6a09953c9e35f75e5df0fa62a624e1833cc5b8086
font_02_sfnt_off0000ae68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE68 16312 bytes
SHA-256: 1d1fa5121415f8f5353993473374918b9d2a38f433752094af4cce5d3be72c8c

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