Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ff7a1e56760ee71…

MALICIOUS

PDF

66.4 KB Created: 2020-03-07 17:05:45 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: bbd9afb64b35caac2eab163f7552dca8 SHA-1: 0d33750c6ec8d1b60b7458d2f43ddd14c2a0acc7 SHA-256: 7ff7a1e56760ee717e1187cbfadba0b1fc3b279a1eafa8580ea9d5d02f66aed3
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

This PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The embedded URLs point to various domains, suggesting an attempt to manipulate search engine results or redirect users to potentially malicious content. No scripts were extracted, and the document body is heavily obfuscated, making it difficult to determine a precise payload, but the sheer volume of links indicates a high-risk operation.

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://houstonasta.voyagerwebsites.com/uploads/1/3/0/4/130483900/130483900.html#diabetic+ketoacidosis+cerebral+oedema PDF link annotation
    • http://bch-marketing.com/uploads/1/3/0/6/130640229/bagifowajuzatufajaga.pdfIn PDF document text
    • http://247thcombatengineers.org/uploads/1/3/0/6/130620868/21b4726b2.pdfIn PDF document text
    • http://north-carolina-charlotte-real-estate.com/uploads/1/3/0/3/130313123/dc26cdf7191f1.pdfIn PDF document text
    • http://tastesoftranscendence.com/uploads/1/3/0/5/130588498/jutodobu_jokuwosavi_rixaloma.pdfIn PDF document text
    • http://802products.net/uploads/1/3/0/5/130589413/nifafibepo_kavovuduwulo.pdfIn PDF document text
    • http://starspinwheel.com/uploads/1/3/0/4/130488181/9336619.pdfIn PDF document text
    • http://ececonline.org/uploads/1/3/0/2/130289377/zupulovomigebose.pdfIn PDF document text
    • http://74-123-78-198.mgwnet.com/uploads/1/3/0/2/130272336/5860792.pdfIn PDF document text
    • http://www.rvrproductions.com/uploads/1/3/0/5/130588405/7625876.pdfIn PDF document text
    • http://theeightoneseven.com/uploads/1/3/0/5/130539235/solivobawomapoketi.pdfIn PDF document text
    • http://www.heartofcaregivingpetsgroomer.com/uploads/1/3/0/6/130603873/ad21fa79851.pdfIn PDF document text
    • http://caqrecords.com/uploads/1/3/0/6/130605278/1374380.pdfIn PDF document text
    • http://www.bordercityhippies.com/uploads/1/3/0/5/130547405/subiji.pdfIn PDF document text
    • http://dvcreationz.com/uploads/1/3/0/5/130542968/9734217.pdfIn PDF document text
    • http://www.cabranegra.net/uploads/1/3/0/9/130969747/ninelazuxoka_vazilototiwagev.pdfIn PDF document text
    • http://advokat-moscow24.site/uploads/1/3/0/2/130272509/biwofekawafit.pdfIn PDF document text
    • http://greenmeadowsfarms.org/uploads/1/3/0/7/130775017/didejijujuju.pdfIn PDF document text
    • http://74-123-76-103.mgwnet.com/uploads/1/3/0/7/130775652/debusokidemow_lezakuw_ninebasomuni.pdfIn PDF document text
    • http://74-123-79-193.mgwnet.com/uploads/1/3/0/8/130813848/kuvuwupo-gojabiwasis-rasajop-nolanaw.pdfIn PDF document text
    • http://myjandj.com/uploads/1/3/0/6/130604962/734fea93463c.pdfIn PDF document text
    • http://www.globalsoundstation.com/uploads/1/3/0/7/130775545/sugak.pdfIn PDF document text
    • http://monto.com.mx/uploads/1/3/0/8/130814226/9568312.pdfIn PDF document text
    • http://luchalibrevive.com/uploads/1/3/0/2/130289271/3119bd68723b4a.pdfIn PDF document text
    • http://www.coloradospringsoption.com/uploads/1/3/0/9/130969220/1159946.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 5

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_off0000c643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC643 8300 bytes
SHA-256: 4f864dc2005c7e54522be472011e0b1d8163dfa1eb54d046abfc734ff18bda3e
font_01_sfnt_off0000e600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE600 16088 bytes
SHA-256: 57b11507310a54ac1804785031a6c50e3b77163964f97d9b63d647909f1b8434

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