Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6add492c094bdf7…

MALICIOUS

PDF

36.7 KB Created: 2020-06-15 04:37:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: c1694b29d069ac39ba7141bc7f77fb8b SHA-1: 143400b64c545dce21b3df31b6262555d4dbc4c2 SHA-256: c6add492c094bdf7d4cabb2378934d2f21f5b3fb4d16c37118852ecc929e5c48
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF document contains a large number of external links, many of which are hosted on domains that appear to be part of a link farm. The document body mentions 'Oakley lens guide', suggesting a lure to entice users to click on these links. The heuristic 'PDF_SEO_LINK_FARM' strongly indicates this is a malicious SEO-based link distribution technique. No scripts were extracted, but the numerous external links are the primary vector for malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://mta-sts.mx.michellepiano.com/uploads/1/3/0/5/130540493/130540493.html#oakley+lens+guide PDF link annotation
    • http://jackvolker.com/uploads/1/3/0/4/130483238/106676.pdfIn PDF document text
    • http://36.wxiguln.vq.com/uploads/1/3/1/4/131453099/9b41b51ed.pdfIn PDF document text
    • http://haylaconsulting.com/uploads/1/3/1/4/131452823/fubidusubupib-jiwesuw-fijexaben-tosuxozixadaj.pdfIn PDF document text
    • http://cplorenzopoolyam.com/uploads/1/3/0/5/130538994/jugaxivejenet.pdfIn PDF document text
    • http://magicalmemoriestravelcompany.net/uploads/1/3/0/6/130605443/sumaxumibow_wiwuv_wenanofij.pdfIn PDF document text
    • http://dmbestlife.com/uploads/1/3/1/4/131437446/98584e8f9a2eb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://xumufikok.files.wordpress.com/2020/06/xepipazedakalafokemumo.pdfIn PDF document text
    • https://bavorekivaso.files.wordpress.com/2020/06/7576307563.pdfIn PDF document text
    • https://kugigoke149047822.files.wordpress.com/2020/06/jupubaxerolidekobev.pdfIn PDF document text
    • https://jidiluda.files.wordpress.com/2020/06/2221797165.pdfIn PDF document text
    • https://wutapega.files.wordpress.com/2020/06/wojovewugowitugori.pdfIn PDF document text
    • https://vomimipuze.files.wordpress.com/2020/06/xolivipomapotelakenij.pdfIn PDF document text
    • https://xobajowupoda.files.wordpress.com/2020/06/ruxejafumefeluwipijewa.pdfIn PDF document text
    • https://letajesuki.files.wordpress.com/2020/06/dibobuwabudekefanidogog.pdfIn PDF document text
    • https://relopupuxa.files.wordpress.com/2020/06/pijukar.pdfIn PDF document text
    • https://womemoz.files.wordpress.com/2020/06/sovuvogajepe.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://scripts.sil.org/OFLIn PDF document text

Related samples 1

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000632b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x632B 10192 bytes
SHA-256: 21060bcc504d4250563808ca2c68efc293c53a45c8fc56fcb59b9c037059113d

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