Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4d8165313c16c8f…

MALICIOUS

PDF

54.5 KB Created: 2020-03-10 03:45:23 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 805b3062d72eebe6278031afa2f9db56 SHA-1: 98617130bf67ae59c6365d563b9272c2e53a4004 SHA-256: c4d8165313c16c8fa48b04a65d85509ae36ee54f3c6769e34b268d37253a9a84
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains text related to medical exercises and references to wkhtmltopdf, suggesting a lure to external content. The primary purpose appears to be directing users to a network of websites, likely for SEO manipulation or to host further malicious content.

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://fun2gotravel.voyagerwebsites.com/uploads/1/3/0/2/130270869/130270869.html#medial+meniscectomy+rehab+exercises PDF link annotation
    • http://soundsgoodmannyc.club/uploads/1/3/0/7/130739839/282979.pdfIn PDF document text
    • http://mx.forthenrybuckskinners.com/uploads/1/3/0/3/130323167/7610309.pdfIn PDF document text
    • http://thirstytree.net/uploads/1/3/0/9/130969509/34f75ed10.pdfIn PDF document text
    • http://yamashitamami.com/uploads/1/3/0/9/130969689/gupirinar_gekoxovige_lumux.pdfIn PDF document text
    • http://akermanfinancialservices.com/uploads/1/3/0/5/130543543/e56ef961e44c9.pdfIn PDF document text
    • http://tomgipson.com/uploads/1/3/0/5/130590672/danafebafodu-fizagu.pdfIn PDF document text
    • http://www.rebelmodesports.com/uploads/1/3/0/8/130874599/fudamitiramurupinu.pdfIn PDF document text
    • http://whiskeygirlsd.com/uploads/1/3/0/2/130291766/zejezux.pdfIn PDF document text
    • http://mx.alleghenywoodcrafts.com/uploads/1/3/0/6/130620965/kirumel-zenipitoretove.pdfIn PDF document text
    • http://annoyanceofthemonthclub.com/uploads/1/3/0/6/130639449/dad312fed0.pdfIn PDF document text
    • http://janemartinmediation.com/uploads/1/3/0/6/130621063/wenoxel-gakuz-doxoborebokibo.pdfIn PDF document text
    • http://gardendivafashions.com/uploads/1/3/0/6/130604187/bebawokajewatob-dofesesugaze.pdfIn PDF document text
    • http://redseaview.de/uploads/1/3/0/2/130271179/6037985.pdfIn PDF document text
    • http://tenpointlogistix.com/uploads/1/3/0/3/130379503/lemidaf.pdfIn PDF document text
    • http://moldyold.com/uploads/1/3/0/2/130271048/xeronidadilorojof.pdfIn PDF document text
    • http://oxnard-photography.com/uploads/1/3/0/6/130621630/ddb5c306d64a.pdfIn PDF document text
    • http://rebeccabevans.com/uploads/1/3/0/4/130483413/e27f6a.pdfIn PDF document text
    • http://www.ziply.co.uk/uploads/1/3/0/6/130604561/resisis_podovamuz_zigomi.pdfIn PDF document text
    • http://livegreaterdayton.com/uploads/1/3/0/5/130551112/6a33c872a07.pdfIn PDF document text
    • http://kingdomstrategyconsulting.org/uploads/1/3/0/4/130483980/saxatosi-kiruforiba.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

Related samples 5

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_off0000abac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABAC 8560 bytes
SHA-256: 953934d185492bd463752ef7a723dd28f750fbcf5a984797622715076e4689aa

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