Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c2c7a9ad11e8655…

MALICIOUS

PDF

38.7 KB Created: 2020-04-08 07:32:41 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e1467ca809ac5f83d70eeb10cc2fe9fb SHA-1: 8eb5fd4ab5542e34399aa95cfd61836408cbd34f SHA-256: 7c2c7a9ad11e86557f860d9cc2f3ff014666032bcea8f694bb9ed9c8f60f58a1
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files on different domains. This behavior is indicative of a link farm or a redirection scheme designed to host malicious content. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, and the document body text is largely unreadable, but the presence of numerous external links is sufficient to infer a malicious intent.

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://reeksgolfpass.com/uploads/1/3/0/5/130550706/130550706.html#material+didactico+para+cuarto+grado+de+primaria+para+imprimir
    • http://healingconnections.biz/uploads/1/3/1/4/131406785/nodamukozatare.pdf
    • http://delinawells.com/uploads/1/3/1/0/131071315/2924322.pdf
    • http://refacingexperts.net/uploads/1/3/0/6/130604350/4216308.pdf
    • http://lamnguen.com/uploads/1/3/1/3/131379503/birinujim_madujejesowu_fevikabalo.pdf
    • http://martincaicedo.com/uploads/1/3/0/5/130590545/9390629.pdf
    • http://peak-trading.com/uploads/1/3/0/4/130483307/4500080.pdf
    • http://baselinewellness.com/uploads/1/3/0/8/130813547/talilovobovaxi-rodabesasuj-witiloza-sozepadexakalo.pdf
    • http://jaimesilversteinyoga.com/uploads/1/3/0/5/130538996/pazelusekewoxix.pdf
    • http://whatsnottolovellc.org/uploads/1/3/0/3/130313553/b1120c3.pdf
    • http://myfinancialarrowbusinesses.com/uploads/1/3/0/6/130604575/214242.pdf
    • http://theroyalchandlery.com/uploads/1/3/0/6/130640132/dekoxonufig.pdf
    • http://cristalcontabilidade.com/uploads/1/3/1/4/131406927/6559912.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_off0000699f.bin
7e58f9791c624dad9ba56251924849779075ae3fe77c2575e1d481c8dfce42d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x699F 9612 bytes

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