Malicious PDF — malware analysis report

Static analysis result for SHA-256 8769f76a48a0720a…

MALICIOUS

PDF

38.0 KB Created: 2020-03-30 04:48:23 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 7ef83ae55b7310a8eb443fa6bcb2fe96 SHA-1: 36bd8863c24a2ef588aba6389d79e87c10998f4e SHA-256: 8769f76a48a0720a9bcc081445277d207736aeaa7a61735787d5f4aeccf5dfe5
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which point to similarly structured URLs on different domains, suggesting a link farm or a method for distributing malicious content. The document body, though partially corrupted, contains text related to chemical bonds and mentions the wkhtmltopdf tool, indicating it was likely generated programmatically to obscure malicious intent. The presence of numerous external URLs strongly suggests an attempt to redirect the user to potentially harmful sites.

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://74-123-77-77.mgwnet.com/uploads/1/3/0/9/130969130/130969130.html#tipos+de+enlaces+ionico+y+covalente PDF link annotation
    • http://huhongye.org/uploads/1/3/0/5/130590123/8983368.pdfIn PDF document text
    • http://reneedumarr.com/uploads/1/3/0/5/130542996/jibomanirig-lokebadumutup-ludopilij.pdfIn PDF document text
    • http://sampriven.com/uploads/1/3/0/5/130589409/8965f96267.pdfIn PDF document text
    • http://townpark.info/uploads/1/3/0/2/130289623/xepuwet-wavego-pozepivitoko.pdfIn PDF document text
    • http://teleformav.org/uploads/1/3/0/6/130621374/7869444.pdfIn PDF document text
    • http://shine2bright.com/uploads/1/3/0/7/130775744/gabemem-buwatavo-zuxirapavesa.pdfIn PDF document text
    • http://benheinrichscounseling.com/uploads/1/3/0/6/130620233/sikejinilivu_voten_sifamit.pdfIn PDF document text
    • http://gointexan.com/uploads/1/3/0/7/130740000/wunulikanesaweposas.pdfIn PDF document text
    • http://coussinavecmoi.com/uploads/1/3/1/3/131398491/taloxeweka.pdfIn PDF document text
    • http://ellenkirtner.com/uploads/1/3/0/7/130776629/1967271.pdfIn PDF document text
    • http://mysimplehandymanservicespittsburgh.com/uploads/1/3/0/5/130588718/5841756.pdfIn PDF document text
    • http://caledoniancall.org/uploads/1/3/0/6/130621218/1986997.pdfIn PDF document text
    • http://boldcounsel.net/uploads/1/3/0/9/130968931/8012708.pdfIn PDF document text
    • http://experiencevintagehome.com/uploads/1/3/0/6/130639913/wufuviwumup.pdfIn PDF document text
    • http://montanahorsesandmules.com/uploads/1/3/0/2/130272577/mideloxazabuvu-duzademuw-kunubuwonokafo-kuzut.pdfIn PDF document text
    • http://lemondeunlimited.com/uploads/1/3/0/8/130813694/bupudobuvig-susafuweteda.pdfIn PDF document text
    • http://mail.psychodrama-sociometry.com/uploads/1/3/0/7/130775196/xifukenawuwu_godojoke.pdfIn PDF document text
    • http://legalsolutionsservices.com/uploads/1/3/0/4/130483146/51fccfbea818d.pdfIn PDF document text
    • http://springs4houstongaragedoors.com/uploads/1/3/1/0/131070483/tibekilanilotopikusu.pdfIn PDF document text
    • http://mail.tavernandtap.com/uploads/1/3/0/3/130379172/1269488.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_off00006c58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C58 7800 bytes
SHA-256: 4621ae9be7deb889c1298b4ee7318a544c0a5b57cd8ffd3be2541a90c7e1c8ed

Open this report in the interactive analyzer, or submit your own file for analysis.