Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba2c31bb4a60190c…

MALICIOUS

PDF

38.6 KB Created: 2020-03-30 13:44:50 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 264e58d423931b1a63270c1f8fe6a43e SHA-1: e62fe85730ab0d002d8890c5de85a8e781850310 SHA-256: ba2c31bb4a60190c1a632fb0f1049e8c584b728788f24de3ae7444d52b60bd90
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a technique often used for SEO poisoning or to distribute further malicious content. The ML classifier strongly indicated maliciousness. The document body, though partially corrupted, contains a URL that is part of this link farm. The primary attack pattern involves directing users to a network of suspicious PDF files hosted on various domains.

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://adsl-63-204-18-4.benefitplans.org/uploads/1/3/0/5/130590163/130590163.html#esquema+que+explique+el+modelo+de+comunicaci%C3%B3n+transaccional
    • http://rydde.services/uploads/1/3/0/7/130776111/dufexixabizew.pdf
    • http://www.roaminitaly.com/uploads/1/3/1/0/131070469/97f95af6.pdf
    • http://actiondirectionaldrilling.com/uploads/1/3/0/4/130476691/2c271c11373fd4.pdf
    • http://bhammondla.com/uploads/1/3/0/8/130874672/48c34217b71.pdf
    • http://bammericsen.com/uploads/1/3/0/4/130483940/bofij.pdf
    • http://pleasuresilb.com/uploads/1/3/0/5/130540049/3558394.pdf
    • http://travelmayariviera.com/uploads/1/3/0/7/130775309/jutiv.pdf
    • http://fatdotmedia.com/uploads/1/3/1/4/131408024/kebinen.pdf
    • http://mavcitystyle.com/uploads/1/3/0/7/130739153/406dc685af86f.pdf
    • http://mysubsidiarity.com/uploads/1/3/0/5/130588500/ripafo_tunebix_gawipanetorole.pdf
    • http://koncgroup.com/uploads/1/3/0/6/130620929/zejokul-wonitejisake-xoranalaz-sizigo.pdf
    • http://solarrainwatersg.com/uploads/1/3/0/5/130588278/nexiwuvarefaburulal.pdf
    • http://lucyspeight.com/uploads/1/3/0/5/130542937/zabebuwusetagamibilo.pdf
    • http://omggrafx.com/uploads/1/3/1/1/131164180/buwox.pdf
    • http://adamssmokedmeats.com/uploads/1/3/0/3/130379332/kusogodiruzo.pdf
    • http://global-migration-of-african-cuisine.com/uploads/1/3/0/4/130483479/mewemexigegofefaj.pdf
    • http://uniquefitsique.com/uploads/1/3/1/1/131163832/586495.pdf
    • http://accessdiving.ca/uploads/1/3/0/6/130620716/gukes.pdf
    • http://sficreative.com/uploads/1/3/0/3/130323390/2158692.pdf
    • http://wifihotspot.shop/uploads/1/3/0/5/130540699/wulipusa-dobofog-talemibejafaw.pdf
    • http://imperiumpropertygroup.com/uploads/1/3/0/6/130620453/boxovurinex-vijudawelovotu.pdf
    • http://kontact.work/uploads/1/3/0/6/130621337/dadab.pdf
    • http://101travelphotos.com/uploads/1/3/1/1/131163898/fd85ec2a9.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069db.bin
80d34a11d4aa06a5f3a804952202d0a61a20e4727533a7a3605858aafef4a2e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69DB 8812 bytes

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