Malicious PDF — malware analysis report

Static analysis result for SHA-256 c69ef4014808b840…

MALICIOUS

PDF

30.5 KB Created: 2020-03-29 13:02:50 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 678cbef5f0fb0cc3cb052e0c757a8ffb SHA-1: 46754f6db51e4ec3850d6a4bba4847491ce1f40a SHA-256: c69ef4014808b840220a116e2569b83b184e090763709bec0036fb84be13b1fa
96 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links likely serve as a link farm to distribute traffic to various potentially malicious sites. The document body contains garbled text and what appears to be metadata from the wkhtmltopdf tool, suggesting it was programmatically generated rather than user-authored content. 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://richter-family.rominastiebenphotography.com/uploads/1/3/1/1/131164257/131164257.html#abcya+parts+of+speech+quest+4 PDF link annotation
    • http://rubberbumperplaterepairkit.com/uploads/1/3/0/7/130740140/topozumozozida-fowisurosefase-sifazebopigize-bibixutir.pdfIn PDF document text
    • http://themamagut.com/uploads/1/3/0/5/130588263/nawavezixaru.pdfIn PDF document text
    • http://barbies-boutique.com/uploads/1/3/0/5/130538922/lirulefodo_zogitevuvotaj_lonugef_luwixetafemepox.pdfIn PDF document text
    • http://coastalbodyrepairs.com/uploads/1/3/0/7/130776699/ab2da04922adacf.pdfIn PDF document text
    • http://adaassurance.net/uploads/1/3/0/4/130483682/bd8c6e0189b975.pdfIn PDF document text
    • http://homeinspectionrepairservice.net/uploads/1/3/0/7/130738661/7738263.pdfIn PDF document text
    • http://counsellingservicesnelson.com/uploads/1/3/0/4/130476339/ganevixifulakoxepoz.pdfIn PDF document text
    • http://jrkproperties.org/uploads/1/3/0/8/130874530/jemuvajipede_gujesof_wamitinum_gonoberawagelug.pdfIn PDF document text
    • http://www.deborah-lindholm.com/uploads/1/3/0/7/130740138/gafumu.pdfIn PDF document text
    • http://hnccleaning.co.nz/uploads/1/3/0/4/130476014/madokiw.pdfIn PDF document text
    • http://laurakraftowitz.com/uploads/1/3/0/3/130313383/ff00a8329.pdfIn PDF document text
    • http://melindachickering.com/uploads/1/3/0/5/130542983/1591542.pdfIn PDF document text
    • http://northdiamondcapital.ca/uploads/1/3/1/3/131381135/wobuzorasinowulov.pdfIn PDF document text
    • http://daddychill.com/uploads/1/3/0/6/130621721/fekesofeb-xesiva.pdfIn PDF document text
    • http://optronics.us/uploads/1/3/0/6/130604808/899137.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
🗂 Part of campaign: optronics.us 3 samples

Related samples 8

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_off00005455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5455 6184 bytes
SHA-256: 545144811dd0807b01ef033d5dd05f601bad8e756b18f8807a125f3b928a77c1

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