Malicious PDF — malware analysis report

Static analysis result for SHA-256 75b4bec7fd42180a…

MALICIOUS

PDF

63.0 KB Created: 2020-04-06 06:46:39 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 4d13ae962fc7a72ae4a46a20555f76a5 SHA-1: 0e8ffaef6ed437265013d6518e36dd819b9b939a SHA-256: 75b4bec7fd42180acd0125ecddd1ce3f4d612504996f3b50296a610d5341b645
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains a large number of external links, suggesting it is part of a link farm or SEO spam campaign. The document body, though obfuscated, contains a URL that appears to be a lure related to Colombian penal code, directing users to external PDF files hosted on various domains. No scripts were extracted from this sample.

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://adventuresbyprice.com/uploads/1/3/0/7/130775256/130775256.html#articulo+tentativa+codigo+penal+colombiano PDF link annotation
    • http://ahmanique.net/uploads/1/3/1/4/131407760/vunak_kevikugigi_zezapivugasupeb_xedad.pdfIn PDF document text
    • http://apogeeinflatables.com/uploads/1/3/0/3/130313728/zukobijaveto.pdfIn PDF document text
    • http://overcomingtraumas.com/uploads/1/3/0/2/130271097/busiw_tazumizado_famumiralop.pdfIn PDF document text
    • http://lindseymichalowski.com/uploads/1/3/0/5/130539759/6047219.pdfIn PDF document text
    • http://aaronbrousseau.com/uploads/1/3/0/6/130621406/8524997.pdfIn PDF document text
    • http://drmcontracting.com/uploads/1/3/0/2/130273978/3298823.pdfIn PDF document text
    • http://alternativesforlife.org/uploads/1/3/0/6/130605175/kopul-fogad-sojekudejib-nebatibedobo.pdfIn PDF document text
    • http://aluminumassault.com/uploads/1/3/0/7/130739183/gujisibokarafu-dotiwevikuz-dedigeza-tarepujej.pdfIn PDF document text
    • http://rachelandedwedding.com/uploads/1/3/0/6/130639765/98764a2dfece.pdfIn PDF document text
    • http://pensacolabirthcenter.com/uploads/1/3/0/9/130969294/037a2fc09b.pdfIn PDF document text
    • http://uaspilotgroundschool.com/uploads/1/3/0/6/130621900/xirowejomi_rufirogel.pdfIn PDF document text
    • http://sgframemaker.com/uploads/1/3/0/2/130289702/zoxofanixexujirudet.pdfIn PDF document text
    • http://rim-foundation.org/uploads/1/3/1/1/131163579/bikut.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b7b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7B4 8880 bytes
SHA-256: 0b2cd0b86ddcaa53b3df739826b7156c71d4a2b24e69d20127d4c49618ec8c2e
font_01_sfnt_off0000d6e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E1 16208 bytes
SHA-256: b4eaba1313c2ae02e0840532e8df49817f4492e706e7fc7006fa435ca033da2a

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