Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef698f5e646a00c8…

MALICIOUS

PDF

46.3 KB Created: 2020-03-21 19:29:46 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 4fbc7b86544fbce1cf2b73c6909f472c SHA-1: f7d286b9786e2c5b2792e0d1d2a432f6d98a0776 SHA-256: ef698f5e646a00c84ea0bb42620de4c6c1fb590e7bfec2de627777e30af81d43
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or SEO manipulation tactic. One of the embedded links is http://msgarletts-hancock.com/uploads/1/3/0/4/130435848/130435848.html#teoria+cuantica+fisica+moderna. The document body contains garbled text and what appears to be metadata from the wkhtmltopdf tool, but the primary malicious activity is the distribution of these external links.

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://msgarletts-hancock.com/uploads/1/3/0/4/130435848/130435848.html#teoria+cuantica+fisica+moderna PDF link annotation
    • http://www.rosascleaningservice.net/uploads/1/3/0/3/130379561/vupabigopanuf.pdfIn PDF document text
    • http://easyaffiliaterevenue.com/uploads/1/3/0/5/130588622/2562447.pdfIn PDF document text
    • http://patsaks.com/uploads/1/3/0/5/130551214/vikepe.pdfIn PDF document text
    • http://b-lights.net/uploads/1/3/0/6/130621261/268f8.pdfIn PDF document text
    • http://www.headlinesinrockinghinc.com/uploads/1/3/0/4/130489410/nesejudupodo.pdfIn PDF document text
    • http://e-bikeregistry.com/uploads/1/3/0/5/130543552/8146935.pdfIn PDF document text
    • http://childrenslessons.org/uploads/1/3/0/6/130639192/rimipaturavinisew.pdfIn PDF document text
    • http://druckereyes.net/uploads/1/3/0/5/130588731/mubito.pdfIn PDF document text
    • http://www.brightstarastro.com/uploads/1/3/0/6/130605338/kagexanurijokolexub.pdfIn PDF document text
    • http://www.theatricks.us/uploads/1/3/0/2/130289417/4788030.pdfIn PDF document text
    • http://soundnotion.tv/uploads/1/3/0/6/130605107/2405591.pdfIn PDF document text
    • http://bennetturbanfarm.com/uploads/1/3/0/8/130814769/2652290.pdfIn PDF document text
    • http://seaplanediving.com/uploads/1/3/0/4/130476069/dd2d4102505c7d1.pdfIn PDF document text
    • http://shadowbendtest7.com/uploads/1/3/0/6/130605069/89a3365e95.pdfIn PDF document text
    • http://axecable.com/uploads/1/3/0/5/130543761/parozevo.pdfIn PDF document text
    • http://morbidmugs.com/uploads/1/3/0/3/130313368/velepavukeba.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: conversioncinema.com 7 samples

Related samples 2

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_off00008b45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B45 8524 bytes
SHA-256: 8d5fd315889016e162e7240f78b73cd1b1460580c1c09cd388162a81a75491a8

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