Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dcdd7aaa7a21dfd…

MALICIOUS

PDF

33.6 KB Created: 2020-03-09 02:56:01 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 5b22748f24ebe38bfd0b48b2ac05f10a SHA-1: 5e9b8d8178faa7819a35871e8f5fa85ce6d06e49 SHA-256: 2dcdd7aaa7a21dfdc05d6386f962846b3b21a33b162ea4b31a75cf7f006e5803
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to similarly structured URLs on different domains. The document body includes text referencing an "access forbidden error 403 apache and linux" and also contains embedded URLs. This suggests a link farm or redirection scheme designed to obscure the true destination and potentially trick users into visiting malicious sites. 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://xinli88wangshangyule.br3h.com/uploads/1/3/0/4/130483986/130483986.html#access+forbidden+error+403+apache+and+linux PDF link annotation
    • http://exploreeasttennessee.com/uploads/1/3/0/4/130489023/dfd1cb276f6.pdfIn PDF document text
    • http://ajhollowayministries.com/uploads/1/3/0/7/130738797/kinexunenutis.pdfIn PDF document text
    • http://seniorimacademy.com/uploads/1/3/0/3/130313249/e9f8d3aafe8e293.pdfIn PDF document text
    • http://notyourmothersboutique.com/uploads/1/3/0/9/130969934/5372052.pdfIn PDF document text
    • http://pixiechildcare.org/uploads/1/3/0/5/130551739/guzazubufetize.pdfIn PDF document text
    • http://mysss.ca/uploads/1/3/0/5/130589035/ketobe-korulu-sojuvunotawu.pdfIn PDF document text
    • http://myleafandcompany.com/uploads/1/3/0/5/130588651/zuvel.pdfIn PDF document text
    • http://mail.stjohnwc.org/uploads/1/3/0/7/130774977/wixevuzimu.pdfIn PDF document text
    • http://sophiecharlottephotography.com/uploads/1/3/0/7/130739404/lekibew-zutusixonoxil-lifumigax.pdfIn PDF document text
    • http://muluc.net/uploads/1/3/0/2/130291415/kenufevaxatip_nezanukoretur_kulita.pdfIn PDF document text
    • http://beerimbiber.com/uploads/1/3/0/6/130639924/7943756.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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B1B 7764 bytes
SHA-256: 9038c86fd80031bf03d744c6841dfb153a7f954141adb07d8b7f39dc083ed51c