Malicious PDF — malware analysis report

Static analysis result for SHA-256 291503395a70e5de…

MALICIOUS

PDF

37.6 KB Created: 2020-03-29 02:25:52 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 96dc24eee6b514d8fdd2d36bf2f337ec SHA-1: 1cd2be9250164cb6e5950e68b214eedf7157c518 SHA-256: 291503395a70e5de17876ff3689ad88fa5848b27827ddbc74e8bce0426f0662d
92 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The document body contains garbled text and a reference to 'Sumas y restas con dificultad segundo grado', suggesting a lure. The primary attack pattern involves directing users to a network of external URLs, likely for SEO manipulation or to host further malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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
  • 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://mymissblue.com/uploads/1/3/0/8/130815115/130815115.html#sumas+y+restas+con+dificultad+segundo+grado
    • http://aspiredc.org/uploads/1/3/0/7/130776786/panadonadeji_buxilela_zamixumiredefi_jipurazulamixi.pdf
    • http://mail.queyroi.com/uploads/1/3/0/8/130874272/1376147.pdf
    • http://managehelper.com/uploads/1/3/0/6/130604083/8269253.pdf
    • http://ibhpalmsprings.com/uploads/1/3/0/2/130272384/f7d65737a1d5f1.pdf
    • http://brilliantnetworker.com/uploads/1/3/0/6/130604305/3709d0a377.pdf
    • http://alisaskincare.shop/uploads/1/3/0/8/130874148/82b3c41782fe55.pdf
    • http://www.gpwtravels.com/uploads/1/3/0/7/130739348/6146833.pdf
    • http://www.letsbreakbarriers.com/uploads/1/3/0/9/130969418/3179010.pdf
    • http://messianicmetis.ca/uploads/1/3/0/5/130551907/vidaxi-jiwimugid.pdf
    • http://mx.midlothianhousecleaning.com/uploads/1/3/0/2/130271234/db7c2ce834120.pdf
    • http://charlestonmanufacturingcenter.com/uploads/1/3/0/2/130272485/fbe1908f23.pdf
    • http://kylebragger.net/uploads/1/3/0/3/130379548/vefevikew-pulalapivivoniz-mirowe.pdf
    • http://corbeauphotos.com/uploads/1/3/0/4/130478882/1437f15f25c55.pdf
    • http://childrensliteratureandreading.org/uploads/1/3/0/6/130621744/fd75f83751e0.pdf
    • http://exceedgrainmarketing.ca/uploads/1/3/0/5/130588805/7013b4690d.pdf
    • http://uslegalmediators.com/uploads/1/3/0/7/130738676/3695710.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_off0000697b.bin
bf6cab9ebc8cebe03de79a5ad95240d34b8ed046d287ca444978f060a4aefb8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x697B 8088 bytes

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