Malicious PDF — malware analysis report

Static analysis result for SHA-256 270d3ed62454abcc…

MALICIOUS

PDF

79.2 KB Created: 2020-04-06 12:45:37 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: f51ffac049845fde576c97b639f524a2 SHA-1: 086e1b5f4bbb95b4f4a2c7cc6ddd1227eaf9093f SHA-256: 270d3ed62454abcc954906cac79362a0cdb2956587b2cbdd76799e295b6cab2a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which point to similarly structured URLs on different domains, indicating a link farm or SEO manipulation tactic. The primary embedded URL, http://adoptme.info/uploads/1/3/0/4/130435748/130435748.html#que+es+una+persecuci%C3%B3n+laboral, suggests a lure related to labor persecution, likely to drive traffic to a malicious site. The ML classifier strongly flagged this PDF as malicious.

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://adoptme.info/uploads/1/3/0/4/130435748/130435748.html#que+es+una+persecuci%C3%B3n+laboral PDF link annotation
    • http://woodburningstoveswales.com/uploads/1/3/0/2/130287815/zekajevisovusa.pdfIn PDF document text
    • http://beggintobehave.net/uploads/1/3/0/2/130274305/tomade-lasuzozoxevuzo.pdfIn PDF document text
    • http://mycancundental.com/uploads/1/3/0/5/130551309/5696836.pdfIn PDF document text
    • http://stjohnlutheranchurchjension.org/uploads/1/3/0/3/130313176/5960857.pdfIn PDF document text
    • http://stellarconcessions.com/uploads/1/3/0/2/130271234/bukideruxel.pdfIn PDF document text
    • http://cleaningsantabarbara.com/uploads/1/3/1/4/131407164/4ea804e3b44ce0.pdfIn PDF document text
    • http://faezehaehsani-interiordesigner.com/uploads/1/3/0/8/130873710/baberomebefoli_suranokonuwuvu_pemutave_kugenowij.pdfIn PDF document text
    • http://coachfro.com/uploads/1/3/0/8/130874198/53315.pdfIn PDF document text
    • http://deltonawellness.com/uploads/1/3/0/3/130323996/voxelutukilev.pdfIn PDF document text
    • http://qatarfireengineering.com/uploads/1/3/0/5/130589040/f728697712.pdfIn PDF document text
    • http://monsieurcoulibaly.com/uploads/1/3/0/7/130739845/zokowurorijoti.pdfIn PDF document text
    • http://mimis-nice-ice.com/uploads/1/3/1/1/131164210/5205564.pdfIn PDF document text
    • http://rottenapplebackpackers.com/uploads/1/3/0/8/130874595/rodokobarem-fijubufipizijo.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

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_off0000e885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE885 10724 bytes
SHA-256: b4836255e091554e3500ea9facfa1c850bc1b74331b177c6e91848cf4680804b
font_01_sfnt_off00010ec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC5 2652 bytes
SHA-256: e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc
font_02_sfnt_off0001182c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1182C 16036 bytes
SHA-256: 779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63

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