Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d44944beec81414…

MALICIOUS

PDF

35.9 KB Authoring application: Adobe PDF Library 9.0
MD5: 7af250af836ce4a6ab7fd48991010336 SHA-1: f3526498325d25bf9694ff3c8457b70fcc42d090 SHA-256: 0d44944beec814143d7527cbccb2bcc3adf08b60087c0b240a1ff2e2b3222e79
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links to external PDF files hosted on various domains, indicating a link farm or a distribution mechanism for further malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the extensive use of external links points towards a watering hole or SEO poisoning attack.

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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://loto2019.site/uploads/1/3/0/6/130640139/sedejagabokeb.pdf
    • http://dal-ma.com/uploads/1/3/0/6/130621938/8845129.pdf
    • http://www.diskonhore.com/uploads/1/3/0/5/130590278/e3bfbbcd9be.pdf
    • http://tutatchikov.org/uploads/1/3/0/4/130477448/7355459.pdf
    • http://creatables.ca/uploads/1/3/0/6/130621131/zenax-powom-pisanogoke.pdf
    • http://chrismerbler.com/uploads/1/3/0/5/130546486/1c8a53f7aad1c8.pdf
    • http://freefarefinder.com/uploads/1/3/0/7/130775109/a66fa4e4.pdf
    • http://arlingtoncarpetcleaner.com/uploads/1/3/0/6/130605275/nesasoxaboxanituriju.pdf
    • http://autodiscover.mwtac.com/uploads/1/3/0/4/130483864/buvokuses.pdf
    • http://74-123-79-90.mgwnet.com/uploads/1/3/0/2/130273872/gajeno.pdf
    • http://cpanel.dustibonge.org/uploads/1/3/0/2/130271158/8887650.pdf
    • http://burningmaneurope.com/uploads/1/3/0/7/130739093/2308956.pdf
    • http://lodestar95.goteamonline.com/uploads/1/3/0/3/130323630/7d68c0.pdf
    • http://flipcirco.com/uploads/1/3/0/7/130740441/towipewaxexuwixu.pdf
    • http://www.billyacopucci.com/uploads/1/3/0/7/130739188/9392956.pdf
    • http://landforsaleinlafayettecountyms.com/uploads/1/3/0/5/130588989/7183300.pdf
    • http://www.backup.basaltlibrary.org/uploads/1/3/0/6/130621218/zilid-nipoma-mapuduvipovon-tivatos.pdf
    • http://comicbrickbuilder.com/uploads/1/3/0/9/130969423/1439442.pdf
    • http://programsformindfulliving.com/uploads/1/3/0/6/130621628/xekumi_fugin_zidafavoki.pdf
    • http://driving-school.pdio.ca/uploads/1/3/0/3/130324037/fofotu.pdf
    • http://bakulajournalism.com/uploads/1/3/0/2/130287873/130287873.html#icd+10+code+for+endovascular+abdominal+aortic+aneurysm+repair

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002dca.bin
d3d7c7eb48fc7af780b1587ddf6a3b6bcf60eb9f2663c06662143e01a0634278		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2DCA 7528 bytes

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