Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8d143e3bb582dd6…

MALICIOUS

PDF

43.1 KB Created: 2020-04-03 13:05:39 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: fef5868902599921807bc06db622750c SHA-1: 35bcda98f9225caf0e621409d357525bf910c5f1 SHA-256: c8d143e3bb582dd66778f24226893d76adf7601b34d3ce4a8592734345812092
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or a distribution mechanism for further malicious content. The document body contains garbled text and some URLs, reinforcing the idea that the primary function is to redirect users to external resources. 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://sosroadsideassistance.com/uploads/1/3/0/8/130814310/130814310.html#ejemplo+de+entrevista+directa PDF link annotation
    • http://kincaiddrive.com/uploads/1/3/0/5/130539107/8650427.pdfIn PDF document text
    • http://ajibyamandachristine.com/uploads/1/3/0/3/130324152/luweso.pdfIn PDF document text
    • http://glamourpossum.com/uploads/1/3/0/7/130739852/751d0.pdfIn PDF document text
    • http://nutshotentertainment.com/uploads/1/3/0/2/130289344/1486843.pdfIn PDF document text
    • http://clearsourcevoip.com/uploads/1/3/0/6/130604548/589b7409eff8ef8.pdfIn PDF document text
    • http://chicagomarketoverview.com/uploads/1/3/0/2/130270743/718380.pdfIn PDF document text
    • http://selfindulgence.org/uploads/1/3/1/4/131484395/f70148.pdfIn PDF document text
    • http://www.yalaavenue.com/uploads/1/3/0/7/130775447/3700234fad8d7.pdfIn PDF document text
    • http://www.lamagna1.com/uploads/1/3/0/3/130323285/1032774.pdfIn PDF document text
    • http://jilljohnsonstorybooks.com/uploads/1/3/1/3/131379643/mexovuwu.pdfIn PDF document text
    • http://avaspady.com/uploads/1/3/0/2/130271179/7808668.pdfIn PDF document text
    • http://xpressionsphotobooths.com/uploads/1/3/0/2/130271177/nexuworezexexav.pdfIn PDF document text
    • http://concretecontractorskc.com/uploads/1/3/0/4/130479570/vituzub_molamedaroze_xakepiputoke.pdfIn PDF document text
    • http://drmaureenpierce.com/uploads/1/3/0/8/130874409/tajufemoperino.pdfIn PDF document text
    • http://intercashpolska.pl/uploads/1/3/0/8/130873877/d383d7d7.pdfIn PDF document text
    • http://hellolovley.com/uploads/1/3/0/4/130483990/dodepupesopaveji.pdfIn PDF document text
    • http://thegeorgiaasthmacoalition.com/uploads/1/3/0/9/130969811/a3814156da5f0c.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 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_off00007d90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D90 8716 bytes
SHA-256: ad901a3ca8553ce43fdc69e66ed4dfb43087e6d8015cc528e96f4b3e3477489a

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