Malicious PDF — malware analysis report

Static analysis result for SHA-256 87425d36b47659f2…

MALICIOUS

PDF

39.0 KB Created: 2020-05-15 19:08:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 3c24efdf89835ba11329788b13cfd4dd SHA-1: 722dd6e30868d8390d1b7f2079e20f44a525609e SHA-256: 87425d36b47659f2fcebd8abf246496dc3f6cd3fd3038ef8c3fd1ceed05ef945
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, indicating a link farm or SEO spamming attempt. The ML classifier strongly flagged this PDF as malicious, and the presence of many URLs suggests an effort to redirect users to potentially harmful content. The document's content is minimal and appears to be a lure to these external 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://handyasiain.com/uploads/1/3/1/6/131606282/131606282.html#bilateral+and+multilateral+trade+agreements+pdf PDF link annotation
    • http://jalan2junkie.com/uploads/1/3/0/4/130478975/gelejoxom_xopokemiw_wosavenaxelawu_jefegajoxepabuw.pdfIn PDF document text
    • http://etvetus.com/uploads/1/3/0/4/130476499/7074773.pdfIn PDF document text
    • http://vivala-hemp.com/uploads/1/3/0/4/130476060/xowizexo.pdfIn PDF document text
    • http://newmandiamonds.com/uploads/1/3/1/4/131438556/85ea1833346229c.pdfIn PDF document text
    • http://pringlesautopromo.com/uploads/1/3/1/4/131408838/nasiseto-nibisebaxalo-zawujujiroputof.pdfIn PDF document text
    • http://jessforcouncil.com/uploads/1/3/0/4/130483645/limaxubeme_nisuvikodefek_losovu_sedik.pdfIn PDF document text
    • http://stowerslynch.com/uploads/1/3/1/4/131410818/1da12d1e5683d7.pdfIn PDF document text
    • http://metdekroofing.com/uploads/1/3/1/3/131398046/fadelewofa.pdfIn PDF document text
    • http://jmservicos.net/uploads/1/3/0/2/130288511/mibilesike.pdfIn PDF document text
    • http://kaizenautoglass.com/uploads/1/3/1/8/131857565/968277.pdfIn PDF document text
    • http://raindropcapital.net/uploads/1/3/0/5/130590224/b79d326e.pdfIn PDF document text
    • http://themindfulsociologist.com/uploads/1/3/1/3/131382470/4228323.pdfIn PDF document text
    • http://hicfmsp.org/uploads/1/3/1/3/131383624/ruteruka-bumugikasu.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
    • http://scripts.sil.org/OFLIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A2C 9496 bytes
SHA-256: 44f31fdf4dddc62687438213e884bc6c483645fbb80d1563fd0e647bada53b9a
font_01_sfnt_off00007aed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AED 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449

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